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Debye model
About: Debye model is a research topic. Over the lifetime, 7462 publications have been published within this topic receiving 133987 citations.
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TL;DR: By measuring the longitudinal and transverse ultrasonic sound velocities along different crystalline directions, the elastic constants C 11, C 33, C 44 and C 12 of CdSe have been determined in the temperature range 0-300 K.
44 citations
TL;DR: In this paper, the heat capacities, transition temperatures, electrical resistivities, and upper critical fields have been measured for a series of La/sub 1-x/Ga/sub x/ alloys with x = 0.16/0.28; specific heat data as a function of concentration suggest a change in short-range order for x between 0.22 and 0.26.
Abstract: The heat capacities, transition temperatures, electrical resistivities, and upper critical fields have been measured for a series of La/sub 1-x/Ga/sub x/ alloys with x = 0.16--x = 0.28. Values of the Debye temperature, density of states, and electron-phonon coupling constant have been determined from these measurements. Superconductivity in this amorphous system is of the intermediate-coupling nature with lambda approx. = 0.8 and the ratio of the nonphonon-renormalized density of states to that of the free-electron model is N/sub ..gamma../(0)/(1 + lambda) N/sub FE/ approx. = 2.2. Specific-heat data as a function of concentration suggest a change in short-range order for x between 0.22 and 0.26.
44 citations
TL;DR: In this paper, the specific heat of high purity aluminum has been measured from 330 to 890°K with an estimated accuracy of ± 0.7 per cent, using dynamic adiabatic calorimetry.
44 citations
TL;DR: In this paper, the perturbation method Tensor LEED designed for the fast calculation of LEED intensities is extended to handle thermal isotropie vibrations of surface atoms.
44 citations
TL;DR: In this article, the thermodynamic and mechanical properties of rutherfordine, a uranyl carbonate mineral, were studied by means of first principles calculations based on density functional theory.
Abstract: The thermodynamic and mechanical properties of rutherfordine, a uranyl carbonate mineral, were studied by means of first principles calculations based on density functional theory. Thermodynamic properties, including enthalpy, free energy, entropy, heat capacity, and Debye temperature, were evaluated as a function of temperature and compared with experimental data in the 300–700 K range. Our calculations show very good agreement with experimental data, and based on them, the knowledge of these properties is extended to the temperature range from 0 to 1000 K, including the full range of thermal stability (0–700 K). The computed values of the heat capacity, entropy, and free energy at 298 K deviate from the experimental values by about 8, 0.3, and 0.3%, respectively. At 700 K, the corresponding differences remain very small, 3.9, 2.3, and 1.3%, respectively. The equation of state and mechanical properties were also computed. The crystalline structure is seen to be mechanically and dynamically stable. Ruther...
44 citations