Resumen
We use the Einstein model to compute the heat capacity of a crystalline solid where the effect of high pressures is simulated through a confined harmonic oscillator potential. The partition function and the heat capacity are calculated in terms of the box size (pressure), finding a clear tendency of the latter quantity to diminish as the pressure increases. For a strong confinement regime (high pressures) the heat capacity increases monotonically with the temperature, whereas at moderate and low pressures, it attains a maximum and asymptotically becomes that corresponding to a set of free (non-interacting) particles in a box. At high temperatures we find that the specific heat value of a crystalline solid under high pressures departs from that predicted by the Dulong-Petit model.
Idioma original | Inglés |
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Páginas (desde-hasta) | 125-129 |
Número de páginas | 5 |
Publicación | Revista Mexicana de Fisica |
Volumen | 55 |
N.º | 2 |
Estado | Publicada - abr. 2009 |