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Home  >  Volume 36 (no2)

Specific heat and compressibility of quasi-particles in metals.by O. G. Edema, O. M. Osiele and S. S. Oluyamo (pages 253-264)
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Abstract

In this paper the specific heat and compressibility of quasi-particles were computed based on the modified Landau theory of Fermi Liquids using the electron density parameter. The Landau Fermi liquid theory’s basic idea is to compare the excited states of the quantum liquid with those of the free Fermi gas. The excited states of the system consist of states where one or more fermions are excited to higher energy states. The method was used to compute the specific heat and compressibility of quasi-particles for some metals. The result obtained revealed that as temperature increases the specific heat of quasiparticles in metals increases. For compressibility, at high density region, there is good agreement between experimental compressibility of metals, computed and Landau values for compressibility of quasi-particles while at low density limit, the level of disagreement between them increases with increase in electron density parameter.The Landau Fermi liquid theory overestimated some properties of quasi-particles, which are supposed to be a contribution to bulk properties of metals. But the modified Landau Fermi liquid theory give a better estimation of the contribution of quasi-particles to the bulk properties of metals when compared with experimental values. The agreement between the computed results and experimental valuesrevealed that the introduction of the electron density parameter in the Landau theory of Fermi Liquidsis promising in predicting the contribution of quasi-particles to the bulk properties of metals.

Keywords: Quasi-particles, Specific heat, Compressibility, Fermi liquid, and Electron density parameter

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