Homepage of Jeppe Dyre. Founder of Glass and Time
Glass and
Time ,
Postbox 260,
DK-4000 Roskilde,Telephone:
Mobile:
Fax:
E-mail: (+45)
46 74 22 84 (+45) 30
25 85 07 (+45) 46 74 30
20
dyre@ruc.dk
I.
Viscous liquids and the glass transition
What causes the
non-Arrhenius behavior of ultraviscous liquids? How does one explain the
non-Debye alpha relaxation? How do we understand the
beta relaxation? How many "order" parameters
are required for describing the thermoviscoelasticity of
glass-forming liquids? What are the consequences
of isomorphs in a system's phase diagram?
-- We have
developed a simple model for the non-Arrhenius behavior - the
'shoving' model - according to which the energy needed for
molecular rearrangements is mainly the shear elastic energy
associated with creating extra space (1996, 1998, 2004, 2006,
2012). -- We have found that, once interference from the
beta process is insignificant, the high-frequency exponent of
the alpha process seems to be always -1/2 (2001, 2007). One
possible explanation is that this is caused by a negative
long-time tail (2005). --
We have proposed a phenomenological model for beta relaxation,
assuming structure is described by just one order parameter
(2003).NVU dynamics",
which consists of geodesic motion on the
constant-potential-energy hypersurface (2011, 2012). Glass and Time , we have studied the random
barrier model numerically as well as analytically (2000, 2002,
2008).III. Other research interests:
Rheology Ion
conduction in glasses 1/f noise Non-linear
response theory
VISCOUS LIQUIDS AND
THE GLASS TRANSITION (XX) (International
workshop, May
15-17, 2024) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XIX) (International
workshop, June 8-10, 2023) VISCOUS LIQUIDS AND THE
GLASS TRANSITION (XVIII) (International workshop, June 23-25, 2022) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XVII) (International workshop, June 10-12, 2021) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XVI) (International
workshop,
May 9-11, 2019) VISCOUS LIQUIDS AND THE
GLASS TRANSITION (XV) (International workshop, June 21-23, 2018) DYNAMICS
OF GLASS-FORMING LIQUIDS: Will theory and experiment
ever meet? ( International workshop, April 5-7, 2017) GREEN
ROAD INFRASTRUCTURE IV ( International workshop, November 24-25,
2016) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XIV) (International workshop, June 16-18, 2016) TOPICAL
MEETING ON MOLECULAR DYNAMICS (Informal
workshop,
August 24, 2015) VISCOUS LIQUIDS AND THE GLASS
TRANSITION (XIII) (International workshop, May 28-30, 2015) ROLLING
RESISTANCE - THIRD COOEE WORKSHOP (International workshop, November 27-28,
2014) DISCUSSION
MEETING ON AGGREGATION AND CLUSTERING OF MOLECULES (International workshop, October 30-31,
2014) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XII) (International workshop, June 12-14, 2014) TOPICAL MEETING ON
MOLECULAR DYNAMICS (Informal workshop, May 26, 2014) GREEN ROAD
INFRASTRUCTURE - SECOND COOEE WORKSHOP (International workshop, November 28-29,
2013) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (XI) (International workshop, May 23-25, 2013) ROLLING
RESISTANCE AN EXPLORATORY WORKSHOP ( International
workshop,
November 29-30, 2012) VISCOUS LIQUIDS AND THE
GLASS TRANSITION (X) (International workshop, June 7-9, 2012) VISCOUS
LIQUIDS AND THE GLASS TRANSITION (IX) (International workshop, June 16-18, 2011) VISCOUS LIQUIDS AND THE GLASS
TRANSITION (VIII) (International workshop, May 28-30, 2010). AGING
OF SLOWLY RELAXING SYSTEMS (Ph.D. summer school, June
19-24, 2009).VISCOUS LIQUIDS AND THE GLASS
TRANSITION (VII) (International workshop, April 24-26, 2009) FRAGILITY
OF VISCOUS LIQUIDS: CAUSE(S) AND CONSEQUENCES
(International workshop, Carlsberg Academy, October 8-10, 2008).LINEAR RESPONSE: THEORY
AND PRACTICE (Ph.D. summer school, July 1-8, 2007).VISCOUS
LIQUIDS AND THE GLASS TRANSITION (VI) (International workshop, June 29 - July 1,
2007).FLOW PROCESSES (3
DNRF-centre workshop, May 9, 2007). VISCOUS LIQUIDS AND THE
GLASS TRANSITION (V) (International workshop, May 26-28, 2006) VISCOUS LIQUIDS AND THE
GLASS TRANSITION (IV) (International workshop, June 3-5, 2005). STRUCTURE
AND DYNAMICS OF METALS AND GLASSES (RUC-Ris workshop , June 4,
2003).VISCOUS LIQUIDS AND THE GLASS
TRANSITION (III) (International workshop, May 9-11, 2003) RELAXATIONS AND RHEOLOGY OF
VISCOUS LIQUIDS AND GLASSES ( RUC-AUC-Rockwool workshop, November
11, 2002 ) BIOLOGICALLY
RELEVANT PHYSICS (RUC-SDU-KVL
workshop, March 25, 2002). VISCOUS LIQUIDS AND THE GLASS
TRANSITION (II) (International
workshop , June 16-18, 2000) . Scientific publications: The EXP pair-potential system.
I. Fluid phase isotherms, isochores, and quasiuniversality
[with Bacher and Schrder], J. Chem. Phys. 149 , 114501
(2018).
The EXP
pair-potential system. II. Fluid phase isomorphs [with Bacher and Schrder] J. Chem. Phys. 149 ,
114502 (2018).
Phase diagram of
Kob-Andersen-type binary Lennard-Jones mixtures [with
Pedersen and Schrder], Phys. Rev. Lett. 120 , 165501
(2018).Isomorph theory of physical
aging , J. Chem. Phys. 148 , 154502 (2018).Simple liquids high-density
viscosity [with Costigliola, Pedersen, Heyes, and Schrder],
J. Chem. Phys. 148 , 081101 (2018).Hydrodynamic relaxations in
dissipative particle dynamics [with Hansen and Greenfield],
J. Chem. Phys. 148 , 034503 (2018).RUMD: A general purpose
molecular dynamics package [with Bailey, Schrder, et al. ],
SciPost Phys. 3 , 038 (2017). Simple-liquid dynamics
emerging in the mechanical shear spectra of PPG [with
Gainaru, Hecksher, Bhmer, et al. ], Colloid Polym. Sci. 295 ,
2433 (2017).Toward broadband mechanical
spectroscopy [with Hecksher, Torchinsky, Klieber, Johnson,
and Nelson], Proc. Natl. Acad. Sci. (USA) 114 , 8710
(2017). Density-scaling exponents and virial
potential-energy correlations in the (2n, n) Lennard-Jones
system [with Friisberg and Costigliola], J. Chem. Sci. 129 ,
919 (2017).Model for the alpha and beta
shear-mechanical properties of supercooled liquids and its
comparison to squalane data [with Hecksher and Olsen], J.
Chem. Phys. 146 , 154504 (2017).Connection between fragility,
MSD, and shear modulus in two glass-forming liquids [with
Hansen, Frick, Hecksher, and Niss], Phys. Rev. B 95 ,
104202 (2017). Pseudoisomorphs in liquids with
intramolecular degrees of freedom [with Olsen and Schrder],
J. Chem. Phys. 145 , 241103 (2016). Rayleigh
scattering revisited ['News and Views'], Nat. Mater. 15 ,
1150 (2016).Pair potential that reproduces
the shape of isochrones in molecular liquids [with Veldhorst
and Schrder], J. Phys. Chem. B 120 , 7970 (2016).Thermodynamics of freezing and
melting [with Pedersen, Costigliola, Bailey, and Schrder],
Nat. Commun. 7 , 12386 (2016).Simple liquids'
quasiuniversality and the hard-sphere paradigm , J. Phys.:
Condens. Matter 28 , 323001 (2016).Studies of the Lennard-Jones
fluid in 2, 3, and 4 dimensions highlight the need for a
liquid-state 1/d expansion [with Costigliola and Schrder],
J. Chem. Phys. 144 , 231101 (2016).Freezing and melting line
invariants of the Lennard-Jones system [with Costigliola and
Schrder], Phys. Chem. Chem. Phys. 18 , 14678 (2016).Thermalization Calorimetry: A simple
method for investigating glass transition and crystallization of
supercooled liquids [with Jakobsen et al. ], AIP Adv.
6 , 055019 (2016).Continuum nanofluidics [with
Hansen, Daivis, Todd, and Bruus], Langmuir 31 , 13275
(2015).Hidden scale invariance of metals
[with Hummel, Kresse, and Pedersen], Phys. Rev. B 92 ,
174116 (2015).Scaling of the dynamics of
flexible Lennard-Jones chains. Effects of harmomic bonds
[with Veldhorst and Schrder], J. Chem. Phys. 143 , 194503
(2015).Narayanaswamys 1971 aging theory
and material time , J. Chem. Phys. 143 , 114507
(2015).Invariants in the Yukawa systems
thermodynamic phase diagram [with Veldhorst and Schrder],
Phys. Plasmas 22 , 073705 (2015).Direct tests of single-parameter
aging [with Hecksher and Olsen], J. Chem. Phys. 142 ,
241103 (2015). A review of experiments testing the
shoving model [with Hecksher], J. Non-Cryst. Solids 407 ,
14 (2015).Isomorph theory prediction for the
dielectric loss variation along an isochrone [with Xiao,
Tofteskov, Christensen, and Niss], J. Non-Cryst. Solids 407 ,
190 (2015). Rolling Resistance Measurement and
Model Development [with Andersen, Larsen,
Fraser, and Schmidt], ACSE J. Transp. Eng. 140 ,
04014075 (2015).Simplicity of condensed matter
at its core: Generic definition of a Roskilde-simple system
[with Schrder], J. Chem. Phys. 141 , 204502 (2014).Density scaling and
quasiuniversality of flow-event statistics for athermal plastic
flows [with Lerner and Bailey], Phys. Rev. E 90 ,
052304 (2014).Explaining why simple liquids are
quasi-universal [with Bacher and Schrder], Nature Commun. 5 ,
5424 (2014).Variation of the dynamic
susceptibility along an isochrone [with Bailey and Schrder],
Phys. Rev. E 90 , 042310 (2014).Cooee bitumen. II. Stability of
linear asphaltene nanoaggregates [with Lemarchand, Schrder,
and Hansen], J. Chem. Phys. 141 , 144308 (2014).Isomorph invariance of the
structure and dynamics of classical crystals [with
Albrechtsen, Olsen, Pedersen, and Schrder], Phys. Rev. B 90 ,
094106 (2014).Hidden scale invariance in condensed
matter , J. Phys. Chem. B 118 , 10007 (2014).Scaling of the dynamics of
flexible Lennard-Jones chains [with Veldhorst and Schrder],
J. Chem. Phys. 141 , 054904 (2014).The mother of all pair potentials
[with Bacher], Colloid. Polym. Sci. 292 , 1971 (2014).Oscillatory shear and high-pressure
dielectric study of 5-methyl-3-heptanol [with Gainaru et
al. ], Colloid. Polym. Sci. 292 , 1913 (2014).The dynamic bulk modulus of
three glass-forming liquids [with Gundermann, Niss,
Christensen, and Hecksher], J. Chem. Phys. 140 , 244508
(2014).The impact range for smooth
wallliquid interactions in nanoconfined liquids [with
Ingebrigtsen], Soft Matter 10 , 4324 (2014).Estimating the density-scaling
exponent of a monatomic liquid from its pair potential [with
Bhling, Bailey, and Schrder], J. Chem. Phys. 140 , 124510
(2014). Entropy and relaxation time , pp. 81-90
in "Fragility of Glass-Forming Liquids", Eds. A. L. Greer, K. F.
Kelton, S. Sastry (Hindustan Book Agency, New Delhi, 2014);
arXiv:1403.2684 (2014).Shear-modulus investigations of
monohydroxy alcohols: Evidence for a short-chain-polymer
rheological response [with Gainaru, Figuli, Hecksher,
Jakobsen, Wilhelm, Bhmer], Phys. Rev. Lett. 112 , 098301
(2014).Predicting how nanoconfinement
changes the relaxation time of a supercooled liquid [with
Ingebrigtsen, Errington, and Truskett], Phys. Rev. Lett. 111 ,
235901 (2013).Statistical mechanics of
Roskilde liquids: Configurational adiabats, specific heat
contours, and density dependence of the scaling exponent
[with Bailey, Bhling, Veldhorst, and Schrder], J. Chem. Phys. 139 ,
184506 (2013).The Rosenfeld-Tarazona
expression for liquids specific heat: A numerical investigation
of eighteen systems [with Ingebrigtsen, Veldhorst, and
Schrder], J. Chem. Phys. 139 , 171101 (2013).Isomorphs, hidden scale
invariance, and quasiuniversality , Phys. Rev. E 88 ,
042139 (2013).Cooee bitumen: Chemical aging
[with Lemarchand, Schrder, and Hansen], J. Chem. Phys. 139 ,
124506 (2013).Two measures of isochronal
superposition [with Roed, Gundermann, and Niss], J.
Chem. Phys. 139 , 101101 (2013). A cool liquid that does not
freeze ['News and Views'], Nat. Phys. 9 , 535 (2013).Aging of CKN: Modulus versus
conductivity analysis , Phys. Rev. Lett. 110 , 245901
(2013).Isomorph invariance of
Couette shear flows simulated by the SLLOD equations of motion
[with Separdar, Bailey, Schrder, and Davatolhagh], J. Chem. Phys.
138 , 154505 (2013).Four-component united-atom model
of bitumen [with Hansen, Lemarchand, Nielsen, and Schrder],
J. Chem. Phys. 138 , 094508 (2013).Mechanical spectra of
glass-forming liquids. I. Low-frequency bulk and shear
moduli of DC704 and 5-PPE measured by piezoceramic transducers
[with Hecksher, Olsen, Nelson, and Christensen], J. Chem. Phys. 138 ,
12A543 (2013).Mechanical spectra of
glass-forming liquids. II. Gigahertz-frequency longitudinal and
shear acoustic dynamics in glycerol and DC704 studied by
time-domain Brillouin scattering [with Klieber, Hecksher,
Pezeril, Torchinsky, and Nelson], J. Chem. Phys. 138 ,
12A544 (2013).NVU
perspective on simple liquids quasiuniversality87 , 022106 (2013).Generalized extended
Navier-Stokes theory: Correlations in molecular fluids with
intrinsic angular momentum [with Hansen, Daivis, Todd,
Bruus], J. Chem. Phys. 138 , 034503 (2013).Do the repulsive and attractive
pair forces play separate roles for the physics of liquids?
[with Bhling, Veldhorst, Ingebrigtsen, Bailey, Hansen, Toxvrd, and
Schrder], J. Phys.: Condens. Matter 25 , 032101 (2013).NVU dynamics. III. Simulating molecules at
constant potential energy137 , 244101 (2012).Cooling by heating demonstrating
the significance of the longitudinal specific heat [with
Papini and Christensen], Phys. Rev. X 2 , 041015 (2012).Scaling of viscous dynamics in
simple liquids: Theory, simulation and experiment [with
Bhling, Ingebrigtsen, Grzybowski, Paluch, and Schrder], New J.
Phys. 14 , 113035 (2012).
Experimental studies of
Debye-like process and structural relaxation in mixtures of
2-ethyl-1-hexanol and 2-ethyl-1-hexyl bromide [with
Preuss, Gainaru, Hecksher, Bauer, Richert, and Bhmer], J.
Chem. Phys. 137 ,
144502 (2012).
Measurement of
the four-point susceptibility of an out-of-equilibrium colloidal
solution of nanoparticles using time-resolved light scattering
[with Maggi, Di Leonordo, and Ruocco], Phys. Rev. Lett. 109 , 097401 (2012).Shear and dielectric responses
of propylene carbonate, tripropylene glycol, and a mixture of
two secondary amides [with Gainaru, Hecksher, Olsen, and
Bhmer], J. Chem. Phys. 137 ,
064508 (2012).CO 2 emission reduction by
exploitation of rolling resistance modelling of pavements
[with Schmidt], Procedia 48 ,
311 (2012).The instantaneous shear modulus
in the shoving model [with Wang], J. Chem. Phys. 136 , 224108 (2012).Energy conservation in molecular
dynamics simulations of classical systems [with Toxvrd and
Heilmann], J. Chem. Phys. 136 ,
224106 (2012).Simplistic Coulomb forces in
molecular dynamics: Comparing the Wolf and shifted-force
approximations [with Schmidt and Schrder], J. Phys. Chem. B
116 , 5738 (2012).Dynamic thermal expansivity of
liquids near the glass transition [with Niss, Gundermann,
and Christensen], Phys. Rev. E 85 ,
041501 (2012).What is a simple liquid? [with
Ingebrigtsen and Schrder], Phys. Rev. X 2 , 011011 (2012).Identical temperature dependence
of the time scales of several linear-response functions of two
glass-forming liquids [with Jakobsen, Hecksher, Christensen,
Olsen, and Niss], J. Chem. Phys. 136 ,
081102 (2012).Thermodynamics of condensed
matter with strong pressure-energy correlations [with
Ingebrigtsen, Bhling, and Schrder], J. Chem. Phys. 136 , 061102 (2012).Isomorphs in the phase diagram of a
model liquid without inverse power law repulsion [with
Veldhorst, Bhling, and Schrder], Eur. Phys. J. B 85 , 21 (2012).Isomorphs in model molecular
liquids [with Ingebrigtsen and Schrder], J. Phys. Chem. B 116 , 1018 (2012).Predicting the density scaling
exponent from Prigogine-Defay ratio measurements [with
Gundermann, Pedersen, Hecksher, Bailey, Jakobsen, Christensen,
Olsen, Schrder, Fragiadakis, Casalini, Roland, and Niss], Nature
Phys. 7 , 816 (2011).Role of the first
coordination shell in determining the equilibrium structure and
dynamics of simple liquids [with Toxvrd], J. Chem.
Phys. 135 , 134501 (2011).Nanoflow hydrodynamics [with
Hansen, Daivis, Todd, and Bruus], Phys. Rev. E 84 , 036311 (2011).NVU dynamics. I. Geodesic
motion on the constant-potential-energy hypersurface [with
Ingebrigtsen, Toxvrd, Heilmann, and Schrder], J. Chem. Phys. 135 , 104101 (2011).NVU dynamics. II. Comparing to
four other dynamics [with Ingebrigtsen, Toxvrd, and
Schrder], J. Chem. Phys. 135 ,
104102 (2011).Simulations of
crystallization in supercooled nanodroplets in the presence of a
strong exothermic solute [with Toxvrd and Larsen], J. Phys.
Chem. C 115 , 12808
(2011).Pressure-energy correlations in
liquids. V. Isomorphs in generalized Lennard-Jones systems
[with Schrder, Gnan, Pedersen, and Bailey], J. Chem. Phys. 134 , 164505 (2011).Do all liquids become strongly
correlating at high pressure? [with Papini and Schrder],
arXiv:1103.4954 (2011).Shifted forces in molecular
dynamics [with Toxvrd], J. Chem. Phys. 134 , 081102 (2011).Beta relaxation in the shear
mechanics of viscous liquids: Phenomenology and network modeling
of the alpha-beta merging region [with Jakobsen, Niss,
Maggi, Olsen, and Christensen], J. Non-Cryst. Solids 357 , 267 (2011).Strongly correlating liquids and
their isomorphs [with Pedersen, Gnan, Bailey, and Schrder],
J. Non-Cryst. Solids 357 ,
320 (2011).A combined measurement of thermal
and mechanical relaxation [with Christensen, Jakobsen,
Papini, Hecksher, and Olsen], J. Non-Cryst. Solids 357 , 346 (2011).Physical aging of molecular
glasses studied by a device allowing for rapid thermal
equilibration [with Hecksher, Olsen, and Niss], J. Chem.
Phys. 133 , 174514 (2010).Repulsive reference potential
reproducing the dynamics of a liquid with attractions [with
Pedersen and Schrder], Phys. Rev. Lett. 105 , 157801 (2010).Connection between slow
and fast dynamics of molecular liquids around the glass
transition [with Niss, Dalle-Ferrier, Frick, Russo, and
Alba-Simionesco], Phys. Rev. E 82 ,
021508 (2010).Aging effects manifested
in the potential-energy landscape of a model glass former
[with Rehwald, Gnan, Heuer, Schrder, and Diezemann], Phys. Rev. E
82 , 021503 (2010).Time reversible molecular
dynamics algorithms with holonomic bond constraints in the NPH
and NPT ensembles using molecular scaling [with
Ingebrigtsen, Heilmann, and Toxvrd], J. Chem. Phys. 132 , 154106 (2010).Predicting the effective
temperature of a glass [with Gnan, Maggi, and Schrder],
Phys. Rev. Lett. 104 ,
125902 (2010).Geometry of slow structural
fluctuations in a supercooled binary alloy [with Pedersen,
Schrder, and Harrowell], Phys. Rev. Lett. 104 , 105701 (2010).Generalized
fluctuation-dissipation relation and effective temperature in
off-equilibrium colloids [with Maggi, Di Leonardo, and
Ruocco], Phys. Rev. B 81 ,
104201 (2010).Correlated volume-energy
fluctuations of phospholipid membranes: A simulation study
[with Pedersen, Peters, and Schrder], J. Phys. Chem. B 114 , 2124 (2010).An electrical circuit model of
the alpha-beta merging seen in dielectric relaxation of
ultraviscous liquids (with Sağlanmak, Nielsen, Olsen, and
Niss), J. Chem. Phys. 132 , 024503 (2010).Pressure-energy correlations in
liquids. III. Statistical mechanics and thermodynamics of
liquids with hidden scale invariance [with Schrder, Bailey,
Pedersen, and Gnan], J. Chem. Phys. 131 , 234503 (2009).Pressure-energy correlations in
liquids. IV. "Isomorphs"
in liquid phase diagrams [with Gnan, Schrder, Pedersen, and
Bailey], J. Chem. Phys. 131 ,
234504 (2009).Hidden scale invariance in
molecular van der Waals liquids: A simulation study [with
Schrder, Pedersen, Bailey, and Toxvrd], Phys. Rev. E 80 , 041502 (2009).Time-reversible molecular
dynamics algorithms with bond constraints [with Toxvrd,
Heilmann, Ingebrigtsen, and Schrder], J. Chem. Phys. 131 , 064102 (2009).Stability of supercooled
binary liquid mixtures [with Toxvrd, Pedersen, and Schrder],
J. Chem. Phys. 130 ,
224501 (2009).Estimating the density scaling exponent
of viscous liquids from specific heat and bulk modulus data
[with Pedersen, Hecksher, Jakobsen, Schrder, Gnan, and Bailey],
arXiv:0904.3537 (2009).A brief critique of the AdamGibbs
entropy model [with Hecksher and Niss], J. Non-Cryst. Solids
355 , 624 (2009).Prevalence of approximate
squareroot(time) relaxation for the dielectric alpha process in
viscous organic liquids [with Nielsen, Christensen,
Jakobsen, Niss, Olsen, and Richert], J. Chem. Phys. 130 , 154508 (2009).Fundamental questions
relating to ion conduction in disordered solids [with Maass,
Roling, and Sidebottom], Rep. Prog. Phys. 72 , 046501 (2009).Exponential distributions of
collective flow-event properties in viscous liquid dynamics
[with Bailey and Schrder], Phys. Rev. Lett. 102 , 055701 (2009).Supercooled
liquid dynamics studied via shear-mechanical spectroscopy
[with Maggi, Jakobsen, Christensen, and Olsen], J. Phys. Chem. B 112 , 16320 (2008).Pressure dependence of the
dielectric loss minimum slope for ten molecular liquids
[with Nielsen, Pawlus, and Paluch], Phil. Mag. 88 , 4101 (2008).Investigation of the
shear-mechanical and dielectric relaxation processes in two
monoalcohols close to the glass transition [with Jakobsen,
Maggi, and Christensen], J. Chem. Phys. 129 , 184502 (2008).Solution of the spherically
symmetric linear thermoviscoelastic problem in the inertia-free
limit [with Christensen], Phys. Rev. E 78 , 021501 (2008).Little evidence for
dynamic divergences in ultraviscous molecular liquids [with
Hecksher, Nielsen, and Olsen], Nature Phys. 4 , 737 (2008).Ac hopping conduction at extreme
disorder takes place on the percolating cluster [with
Schrder], Phys. Rev. Lett. 101 ,
025901 (2008).Pressure-energy correlations in
liquids. I. Results from computer simulations
[with Bailey, Pedersen, Gnan, and Schrder], J. Chem. Phys. 129 , 184507 (2008).Pressure-energy correlations in
liquids. II. Analysis and consequences [with Bailey,
Pedersen, Gnan, and Schrder], J. Chem. Phys. 129 , 184508 (2008).Glass-forming liquids: One or
more order parameters? [with Bailey, Christensen, Jakobsen,
Niss, Olsen, Pedersen, and Schrder], J. Phys. Condens. Matter 20 , 244113 (2008).Can the
frequency-dependent isobaric specific heat be measured by
thermal effusion methods? [with Christensen and Olsen], AIP
Conf. Proc. 982 , 139
(2008).Volume-energy
correlations in the slow degrees of freedom of
computer-simulated phospholipid membranes [with Pedersen,
Peters, and Schrder], AIP Conf. Proc. 982 , 407 (2008).A cryostat and
temperature control system optimized for measuring relaxations
of glass-forming liquids [with Igarashi et al.], Rev. Sci.
Instrum. 79 , 045105
(2008).An
impedance-measurement setup optimized for measuring relaxations
of glass-forming liquids [with Igarashi et al.], Rev. Sci.
Instrum. 79 , 045106
(2008).Feasibility of single-parameter
description of equilibrium viscous liquid dynamics [with
Pedersen, Christensen, and Schrder], Phys. Rev. E 77 , 011201 (2008).Mysteries of the glass transition -
Letter commenting on a Reference Frame by James Langer, Physics
Today 61 (1), 15 (2008).Strong pressure-energy
correlations in van der Waals liquids 100 , 015701 (2008).Solidity of viscous liquids. V.
Long-wavelength dominance of the dynamics , Phys. Rev. E 76 , 041508 (2007).Crystallization of the Wahnstrm
Binary Lennard-Jones Liquid [with Pedersen, Bailey, and
Schrder], arXiv:0706.0813 (2007).Ten themes of viscous liquid
dynamics , J. Phys.: Condens. Matter 19 , 205105 (2007).Conventional methods fail to
measure cp(omega) of glass-forming liquids [with Christensen
and Olsen], Phys. Rev. E 75 ,
041502 (2007).Dominance of shear elastic
energy far from a point defect in a solid , Phys. Rev. B 75 , 092102 (2007).Violations of conservation laws in
viscous liquid dynamics , Philos. Mag. 87 , 497 (2007).Hopping models for ion conduction
in noncrystals [with Schrder], in "Superionic Conductor
Physics" (World Scientific, Singapore, 2007), p. 97 (2007).Single-order-parameter
description of glass-forming liquids: A one-frequency test
[with Ellegaard, Christensen, Christiansen, Olsen, Pedersen, and
Schrder], J. Chem. Phys. 126 ,
074502 (2007).Solidity-induced crystallization of
ultraviscous water (January, 2007).On the possible existence of
crystallites in glass-forming liquids , cond-mat/0612671
(2006).An energy landscape model f or glass-forming liquids in three
dimensions [with Pedersen, Hecksher, and Schrder], J.
Non-Cryst. Solids 352 ,
5210 (2006).Elastic models for the
non-Arrhenius viscosity of glass-forming liquids [with
Christensen and Olsen], J. Non-Cryst. Solids 352 , 4635 (2006).The glass transition and elastic
models of glass-forming liquids , Rev. Mod. Phys. 78 , 953 (2006).Solidity of viscous liquids. IV.
Density fluctuations , Phys. Rev. E 74 , 021502 (2006).Elastic models for the
non-Arrhenius relaxation time of glass-forming liquids , AIP
Conf. Proc. 832 , 113
(2006).A model for the generic alpha
relaxation of viscous liquids , Europhys. Lett. 71 , 646 (2005).Solidity of viscous liquids. III.
Alpha relaxation , Phys. Rev. E 72 , 011501 (2005).Glasses: Heirs of liquid treasures
['News and Views'], Nat. Mater. 3 ,
749 (2004).Landscape equivalent of the
shoving model [with Olsen], Phys. Rev. E 69 , 042501 (2004).Minimal model for beta relaxation
in viscous liquids [with Olsen], Phys. Rev. Lett. 91 , 155703 (2003).Is there a
'native' band gap in ion conducting glasses? , J. Non-Cryst.
Solids 324 , 192 (2003).Computer
simulations of the random barrier model [with Schrder],
Phys. Chem. Chem. Phys. 4 ,
3173 (2002).Hopping models and ac universality
[with Schrder], Phys. Stat. Sol. (b) 230 , 5 (2002).Time-temperature
superposition in viscous liquids [with Olsen and
Christensen], Phys. Rev. Lett. 86 ,
1271 (2001).Beta relaxation of non-polymeric
liquids close to the glass transition [with Olsen and
Christensen], Phys. Rev. E 62 ,
4435 (2000).Universality of ac conduction in
disordered solids [with Schrder], Rev. Mod. Phys. 72 , 873 (2000).Crossover
to potential energy landscape dominated dynamics in a model
glass-forming liquid [with Schrder, Sastry, and Glotzer],
J. Chem. Phys. 112 ,
9834 (2000).Scaling and
universality of ac conduction in disordered solids [with
Schrder], Phys. Rev. Lett. 84 ,
310 (2000).Solidity of viscous liquids. II.
Anisotropic flow events , Phys. Rev. E 59 , 7243 (1999).Solidity of viscous liquids ,
Phys. Rev. E 59 , 2458
(1999).Potential energy landscape
signatures of slow dynamics in glass-forming liquids [with
Sastry, Debenedetti, Stillinger, Schrder, and Glotzer],
Physica A 270 , 301
(1999).Source of
non-Arrhenius average relaxation time in glass-forming liquids ,
J. Non-Cryst. Solids 235-237 ,
142 (1998).Hopping in a supercooled
binary LennardJones liquid [with Schrder], J. Non-Cryst. Solids 235-237 , 331 (1998). Structural relaxation monitored by
instantaneous shear modulus [with Olsen and Christensen],
Phys. Rev. Lett. 81 ,
1031 (1998).A Statistical Mechanical Approximation
for the Calculation of Time Auto-Correlation Functions ,
arXiv: cond-mat/9712222 (1997). Fluctuation-dissipation
theorem for frequency-dependent specific heat [with
Nielsen], Phys. Rev. B 54 ,
15754 (1996).Effective
one-dimensionality of universal ac hopping conduction in the
extreme disorder limit [with Schrder], Phys. Rev. B 54 , 14884 (1996).Universality of anomalous
diffusion in extremely disordered systems [with
Jacobsen], Chem. Phys. 212 ,
61 (1996).Comment on
"Dynamic viscosity of a simple glass-forming liquid" [with
Behrens, Christiansen, and Olsen ],
Phys. Rev. Lett. 76 , 1553
(1996).Local elastic
expansion model for viscous-flow activation energies of
glass-forming molecular liquids [with Olsen and
Christensen], Phys. Rev. B 53 ,
2171 (1996).Universal time-dependence of the
mean-square displacement in extremely rugged energy landscapes
with equal minima [with Jacobsen], Phys. Rev. E 52 , 2429 (1995).Lunar phase influence on
global temperatures , Science 269 , 1284 (1995).Energy master equation - a
low-temperature approximation to Bssler's random-walk model ,
Phys. Rev. B 51 , 12276
(1995).Studies of ac hopping conduction
at low temperatures , Phys. Rev. B 49 , 11709 (1994).Low-temperature
universality in computer simulations of the macroscopic model
for ac conduction in disordered solids [with Riedel], J.
Non-Cryst. Solids 172-174 ,
1419 (1994). Algorithm for fast determination
of complex moduli [with Winther and Kramer], J. Rheol. 38 , 1179 (1994).Universal low-temperature ac
conductivity of macroscopically disordered nonmetals ,
Phys. Rev. B 48 , 12511
(1993).Universal ac conductivity of
nonmetallic disordered solids at low temperatures , Phys.
Rev. B 47 , 9128 (1993).Langevin models
for shear-stress fluctuations in flows of viscoelastic liquids ,
Phys. Rev. E 48 , 400
(1993).Towards a phenomenological definition
of the term 'gel' [with Almdal, Hvidt, and Kramer],
Polymer Gels and Networks 1 ,
5 (1993).Some remarks on ac conduction in
disordered solids , J. Non-Cryst. Solids 135 , 219 (1991). A 'zero-parameter' constitutive
relation for simple shear viscoelasticity , Rheol. Acta 29 , 145 (1990).Maximum-entropy
ansatz for nonlinear-response theory , Phys. Rev. A 40 , 2207 (1989).Correlation
effects in ionic conductivity [with Murch], Crit. Rev.
Solid State 15 , 345
(1989).Random free-energy barrier model
for ac conduction in disordered solids , J. Appl. Phys. 64 , 2456 (1988).Unified formalism for excess
current noise in random-walk models , Phys. Rev. B 37 , 10143 (1988).23 ,
331 (1987).Exponential band tails as a consequence
of the glass transition , Key Engn. Mater. 13 , 501 (1987).Master-equation approach to the
glass-transition , Phys. Rev. Lett. 58 , 792 (1987).A phenomenological model
for the Meyer-Neldel rule , J. Phys. C: Solid State Phys. 19 ,
5655 (1986).On the mechanism
of glass ionic conductivity , J. Non-Cryst. Solids 88 , 271 (1986).Correlation
effects in tracer diffusion and ionic conductivity II
[with Murch], Solid State Ionics 21 ,139 (1986). Correlation effects in tracer
diffusion and ionic conductivity I [with Murch],
Solid State Ionics 20 ,
203 (1986).A simple model of ac hopping
conductivity , J. Physique Colloq. 46 , C8-343 (1985).A simple model of ac hopping
conductivity in disordered solids , Phys. Lett. A 108 , 457 (1985).50 ,
585 (1984). Non-standard characterizations of
ideals in C(X) , Math. Scand. 50 , 44 (1982).Press and
other publications [mostly in Danish]
Vingeslag på formel (med Tina
Hecksher og Jens Hjgaard Jensen), Aktuel Naturvidenskab, nr.
3, p. 18, 2024.
ROSE ,
brief video about the project that led to "KVS asphalt",
presented at the 10-year anniversary of Innovation Fund Denmark, April 16, 2024 . Første mling af materiale-tid ,
Aktuel Naturvidenskab, nr. 1, p. 5, 2024.Glass
ages in material time , Search and Discovery article, Physics Today, May, 2022.
Physical
aging: Theory and Experiments , talk
at "Recent advances on the glass problem", Jan. 5, 2022 (CECAM
on-line conference). Entropiens mysterium (med Ingebrigtsen), Aktuel Naturvidenskab, nr. 1, p.
14, 2022. Topforskere: Træk lod om forskningsmidlerne , Forskerforum, januar 2021. Einstein
lærte os at finde vej , Podcast fra
Videnskabernes Selskab, 12. november, 2020. Forstemmende forhold for
forskningen , Politiken, 14. maj,
2020. The trace back to
the 1960s , talk at the informal
meeting Ten Years of Isomorph Theory , 18. december, 2019. Lodtrækning skal give en mere fair
fordeling af forskningsmidler ,
Science Report, 16. december, 2019. EU ger sit forskningsbudget
men det gør overhovedet ingen forskel for dansk forskning , Science Report, 24. november, 2019. Klimavenlig asfalt reducerer rullemodstand, Aktuel Naturvidenskab, nr. 6, p. 5, 2018.
Ny klimavenlig asfalt giver
solid rabat til bilejerne , DR, 22.
maj, 2018. Et ormehul i
termodynamikken , Weedendavisen, 19.
maj, 2017. Må
man koge vand to gange? ,
Videnskab.dk, 20. februar, 2017. Ny teori for smeltning og frysning (med Ulf Pedersen), Aktuel Naturvidenskab, nr. 4, p.
19, 2016. Naturvidenskabelig
dannelse , gæst i "Hjernekassen p P1",
25. januar, 2016. Hvad med en
naturvidenskablig kanon? (med
Henriette Wase Hansen), Politiken, 19. oktober, 2015. Energibesparelse uden omkostning (med Jesper Larsen og Bjarne Schmidt), Børsens kronik,
1. juli, 2015. Professor:
Nedlg UVVU , Indlæg om Klarlund-sagen
efter Østre Landsrets omstødelse af UVVU-dommen, Altinget.dk, 17.
marts, 2015;
- genoptrykt i BioZoom , September 2015. Den isomorfe
teori , en 22 minutters video på
YouTube af Mikkel Max om isomorfteorien med interviews, 8. april,
2015. Skyggepris. Bedre
veje giver lavere CO 2 udslip , (m. Jesper Larsen og Bjarne Schmidt), Analyse i
Politiken, 4. juni, 2014. I strid med sund
fornuft (med en række andre),
Weekendavisen 20. juni, 2014. Hvordan
kan atomer holde formen på en genstand? , Videnskab.dk, 12. maj, 2014. Opråb til UVVU (med Gregersen, Hjorth og Nosch), Weekendavisen
11.oktober, 2013. 45
år med computersimuleringer ,
Videnskab.dk, 14. juli, 2013 (først publiceret i Dansk Kemi). Verdens ældste
fysikforsøg drypper igen , Berlingske
3. maj, 2013. Cyklister er
sunde og cykling ligeså, Politiken
25. april, 2013. Grafikkort sætter Newton på speed (med Jesper Schmidt Hansen, Nicholas P. Bailey og
Thomas Schrder), Aktuel Naturvidenskab, nr. 1, 2013. Rullemodstand. Sådan
sparer vi energi på vejen (m. Jesper
Larsen og Bjarne Schmidt), Politiken, 28. november, 2012. Overraskende opdagelse om
væsker , Rubrik, april 2012. Glas
kan smelte ved hjælp af kvantevibrationer , Videnskab.dk, 18. februar 2011. Forskning i
bedre asfalt kan spare bilister for millioner, Dagbladet Roskilde Tidende, 4. februar 2011. Bedre
asfalt skal reducere CO 2 -udledningen , Videnskab.dk, 24. januar 2011. Bedre
asfalt skal spare benzin , Politiken
23. januar 2011. P1
morgenindslag , 16.januar 2010. Videnskabens
Verden , Program p P1, 16. januar
2010. Den fjerde tilstand , Weekendavisen, 16. oktober, 2009. Glas
er ikke bare glas . Nyhedsindslag i
TV2 Lorry, 18. september 2009 . Overraskelsesangreb ramte
forsiden , Videnskab.dk, 22. januar,
2009. Termiske
fluktuationer er der noget nyt under Solen? , (med Ulf Pedersen og Thomas Schrøder) Kvant
(Tidsskrift for Fysik og Astronomi) 19
(4), 26 (2008). 100 milliarder sole i Mlkevejen , Weekendavisens minikronik, 4. januar, 2008. Glastilstanden , Naturens Verden 7/8 , 47
(2007). Glas - en sej væske! , Hippocampus 13/05 2007. Glas -
den fjerde tilstandsform , Aktuel
Naturvidenskab, nr. 2, 2006. Seje væskers fysik , debut på Politikens ny serie "Kedsomologi", 8. januar,
2006. Seje væsker og glasovergangen (med Thomas Schrøder), Kvant (Tidsskrift for Fysik og
Astronomi) 17 (1), 12 (2006). Interview i "Glas" - Tidsskrift
for Glarmesterlauget i Danmark ,
Efterr 2005 (side 10-11). Interview i forbindelse med
Connect Denmark arrangementet "Meet the researcher" , September 2005. En introduktion til mekanik , indledning til SMK på mekanikken - Experimentariums skolekonkurrence 2005 for 3. og 4.
klasser, juli 2005. Omtale og interview i RUC-NYT i forbindelse med centeråbningen d. 2. juni 2005 (side
3). Universitetslisten , program ved valget af VIP-repræsentant i RUCs
bestyrelse, maj, 2004. Tre
sandheder om projektarbejdet: Fra "Ja" til "Tja" , indlæg ved IMFUFAs jubilumskonference, oktober, 2003. Forskningsfrihed i fare (med Mogens Niss), debatindlæg i Jyllands-Posten, 17.
februar, 2003. Faglig nedtur ,
Politikens kronik, 7. januar, 2003. Back to basics! , Kvant (Tidsskrift for Fysik og Astronomi) 13 (3), 34 (2002). Fysikkens æstetik ,
festtalen ved RUCs årsfest d. 21. september, 2001. Den kolde fusion gav varme
ører [m. Pia Borgstrm], Samvirke p.
78, juni, 2000. Når en væske "glasser" (med Tage Christensen og Niels Boye Olsen)- kort og
populrt om vores forskning (fra RUC-NYT, 1997/98).
Do you mind when things don't
pan out?
Wilson Greatbatch (b. 1919), inventor of the
pacemaker.
The real
difficulty in changing any enterprise lies not in developing new
ideas, but in escaping from the old ones. - John Maynard Keynes 
