Disordered systems show deviations from the standard Debye theory of specific heat at low temperatures. These deviations are often attributed to two-level systems of uncertain origin. We find that a source of excess specific heat comes from correlations between quanta of energy if phonon-like excita...
The modified Debye-Einstein approximation model is used to calculate nanoscale size-dependent values of Gruneisen parameters and lattice specific heat capacity for Si nanowires. All parameters forming the model, including Debye temperatures, bulk moduli, the lattice thermal expansion and the lattice ...
The Debye model can be refined in several ways. For instance the three acoustic branches could be treated with different sound velocities. In the case of crystals with a basis, one could use the Debye model for the acoustic modes and the Einstein model for the optical modes. We notice that...
In 1917, he applied the general theory of relativity to model the structure of the universe.[13][14] He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal p...
inconsistency between the two expressions, Eqs (1) and (2). However, the direct measurement ofRis impractical for molecular liquids both in experiments and MD simulations. More practically, the breakdown of the Debye model,i.e., the\(\ell \)dependence of\({\tau }_{\ell }\), prevents ...
The modified Debye鈥揈instein approximation model is used to calculate nanoscale size-dependent values of Gruneisen parameters and lattice specific heat capacity for Si nanowires. All parameters forming the model, including Debye temperatures, bulk moduli, the lattice thermal expansion and the lattice ...
SPECIFIC heatDEBYE'S theoryA new alternative approach has been suggested for evaluating the heat capacities of stannous selenide (SnSe), based on the Einstein-Debye approximation. It is well known the thermal behavior of solids is a very important theoretical problem that has bee...
Empirical values (from the literature) of the frequencies that characterize the Einstein, the Nernst–Lindemann, and also the Debye formulae are all in support of the present theory. PACS Nos.: 65.40.Ba, 01.55.+bIronsSchoolF.E.SchoolCanadian Journal of Physics...