L

Laura Gil

Forschungszentrum Jülich

Publishes on Phase Equilibria and Thermodynamics, Thermodynamic properties of mixtures, Chemical Thermodynamics and Molecular Structure. 30 papers and 703 citations.

30Publications
703Total Citations

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Top publicationsby citations

Low-temperature specific heat and thermal conductivity of glasses
Laura Gil, M. A. Ramos, A. Bringer et al.|Physical Review Letters|1993
Cited by 188

The soft potential model (an extension of the tunneling model to include soft localized vibrations) is shown to describe the anomalous features of the specific heat ${\mathit{C}}_{\mathit{P}}$ and the thermal conductivity of glasses over the entire low-temperature range, up to an including the peak in ${\mathit{C}}_{\mathit{P}}$/${\mathit{T}}^{3}$ and the second rise of the thermal conductivity above the plateau.

The Density of Tunneling and Vibrational States of Glasses within the Soft-Potential Model
M. A. Ramos, Laura Gil, A. Bringer et al.|physica status solidi (a)|1993
Cited by 46

Numerical calculations of the density of tunneling and vibrational states of glasses within the soft-potential model (an extension of the tunneling model to include soft vibrations) are reported and compared to analytical approximations. Using a specific assumption on the asymmetry of the soft potentials, one is able to describe the anomalous features of the specific heat Cp and the thermal conductivity of glasses over the entire low temperature range, up to and including the peak in Cp/T3 and the second rise of the thermal conductivity above the plateau. Es wird über numerische Rechnungen zum Modell weicher Potentiale berichtet (eine Erweiterung des bekannten Tunnelmodells für Gläser auf eine gemeinsame Beschreibung von Tunnelzuständen, weichen Schwingungen und Relaxationen). Die Ergebnisse werden mit analytischen Näherungen verglichen. Eine spezielle Annahme über die Asymmetrieverteilung der weichen Potentiale ermöglicht eine Beschreibung der Glasanomalien der spezifischen Wärme Cp und der Wärmeleitung im gesamten Tieftemperaturbe-reich, einschließlich des Maximums in Cp/T3 und des erneuten Anstieges der Wärmeleitung oberhalb des Plateaus.