Degenerate Fermi liquid

For a degenerate Fermi liquid, finite-size shell effects are much reduced if the twist angle is averaged over twist averaged boundary conditions (TABC) [30]. For any given property A the TABC is defined as... 

The particles we will deal with in this textbook are mainly electrons and ions in condensed solid and liquid phases. In condensed phases ions are the classical Boltzmann particles and electrons are the degenerated Fermi particles. 

C104 [286] which can be fitted with the same idea as the PPP case [322], it was conected by the authors of [278] that it was not reproducible but that in this case the origin of the non-Curie behaviour is due to missing thermal contact between the sample and sample tube without Helium gas that is effective even at liquid Helium temperature. On the temperature-independent susceptibility, there i.s not enough data to conclude if it is an evidence for the degenerate Fermi electrons with the definite Fermi level ora Fermi glass system, and the extent of disorder would be a crucial parameter for these materials. 

Fig. 27. Resistivity p(T) (a), thermoelectric power S(T) and Lorenz number L T) (b), calculated with LNCA techniques for a sixfold degenerate Anderson lattice model in the Kondo regime (Cox and Grewe 1988). Impurity results, scaled with concentration are shown for comparison. The resistivity results exhibit the logarithmic increase with decreasing temperature and the coherence-derived decrease below T = to the residual value due to impurities, which is quadratic in the Fermi liquid regime T < T. S(T ) is positive definite for the simple model situation chosen.

The single-band ladder extension of the one-dimensional Hubbard model [18,19,22] has been utilized as a minimalist model to smdy spin-liquid behavior [11, 14, 43] and high-temperature superconductors [1, 5, 21, 25, 44]. The ladder model is a quasi-one-dimensional system with a fourfold degenerate Fermi surface and correlations in two-dimensions. 

According to London s theory, the superfluidity of liquid He-II is due to its behaviour as a degenerate Bose-Einstein gas. Since the isotope He (unlike ordinary helium, He) obeys Fermi-Dirac Statistics ( 32.IV), its h quid should not show superfluidity, and this was found experimentally. ... 

---