921 citations · 10.1k across the 159 of their papers we have counts for
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Thermal expansion and the glass transition
P. Lunkenheimer, A. Loidl, B. Riechers +2
Melting is well understood in terms of the Lindemann criterion, essentially stating that crystalline materials melt when the thermal vibrations of their atoms become such vigorous…
Universal correlations between the fragility and interparticle repulsion of glass-forming liquids
Peter Lunkenheimer, Felix Humann, Alois Loidl +1
A recently published analytical model, describing and predicting elasticity, viscosity, and fragility of metallic melts, is applied for the analysis of about 30 nonmetallic glassy…
Johari-Goldstein relaxation in glass-electrets
P. Lunkenheimer, F. Humann, D. Reuter +3
We investigate the dielectric response in the glass-electret state of two dipolar glass-forming materials. This unusual polar glassy state of matter is produced when a dipolar liqu…
Plastic-crystalline solid-state electrolytes: Ionic conductivity and orientational dynamics in nitrile mixtures
D. Reuter, P. Lunkenheimer, A. Loidl
Many plastic crystals, molecular solids with long-range, center-of-mass crystalline order but dynamic disorder of the molecular orientations, are known to exhibit exceptionally hig…
Low temperature dielectric relaxation study of aqueous solutions of diethylsulfoxide
L. Gabrielyan, S. Markarian, P. Lunkenheimer +1
In the present work, dielectric spectra of mixtures of diethylsulfoxide (DESO) and water are presented, covering a concentration range of 0.2 - 0.3 molar fraction of DESO. The meas…
Excess wing in glass-forming glycerol and LiCl-glycerol mixtures detected by neutron scattering
S. Gupta, N. Arend, P. Lunkenheimer +5
The relaxational dynamics in glass-forming glycerol and glycerol mixed with LiCl is in-vestigated using different neutron scattering techniques. The performed neutron spin-echo exp…
Broadband dielectric spectroscopy on benzophenone: alpha relaxation, beta relaxation, and mode coupling theory
P. Lunkenheimer, L. C. Pardo, M. Köhler +1
We have performed a detailed dielectric investigation of the relaxational dynamics of glass-forming benzophenone. Our measurements cover a broad frequency range of 0.1 Hz to 120 GH…
Dielectric spectroscopy in benzophenone: The beta relaxation and its relation to the mode-coupling Cole-Cole peak
L. C. Pardo, P. Lunkenheimer, A. Loidl
We report a thorough characterization of the glassy dynamics of benzophenone by broadband dielectric spectroscopy. We detect a well pronounced beta relaxation peak developing into…
Dielectric spectroscopy on aging glasses
P. Lunkenheimer, R. Wehn, A. Loidl
In the present work, we provide further evidence for the applicability of a modified stretched-exponential behavior, proposed recently for the description of aging-time dependent d…
Glassy freezing of orbital dynamics in FeCr2S4 and FeSc2S4
R. Fichtl, P. Lunkenheimer, J. Hemberger +2
We report on a thorough dielectric investigation of the glass-like freezing of the orbital reorientation-dynamics, recently found for the crystalline sulpho-spinels FeCr2S4 and FeS…
Orbital Freezing in FeCr2S4 Studied by Dielectric Spectroscopy
R. Fichtl, P. Lunkenheimer, J. Hemberger +2
Broadband dielectric spectroscopy has been performed on single-crystalline FeCr2S4 revealing a transition into a low-temperature orbital glass phase and on polycrystalline FeCr2S4…
Fast Dynamics of Glass-forming Liquids investigated by Dielectric Spectroscopy: a Comparison
U. Schneider, P. Lunkenheimer, R. Brand +1
We have performed dielectric spectroscopy on the molecular glass-formers glycerol, propylene carbonate (PC) and the ionic melts CKN and CRN. The frequency range covers almost 20 de…