Thermodynamics of a Charged Fermion Layer at High {ital r{sub s}} Values
- Solid State Institute and Physics Department, Technion --- Israel Institute of Technology, Haifa 32000 (Israel)
The chemical potential {mu} of a hole layer is mapped as a function of temperature and density {ital p}. We present the first investigation of the crossover from the strongly interacting degenerate regime to the classical ideal gas limit. The low temperature inverse compressibility, {kappa}{sup {minus}1}{equivalent_to}{ital p}{sup 2}{partial_derivative}{mu}/{partial_derivative}{ital p}, is negative and temperature independent. At {ital T}{approx_equal}17 K temperature dependence commences abruptly: {kappa}{sup {minus}1} turns less negative with rising {ital T} and eventually reverses sign. An ideal classical gas is attained at temperatures comparable to the interaction energy, more than an order of magnitude larger than the Fermi energy. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 390579
- Journal Information:
- Physical Review Letters, Vol. 77, Issue 15; Other Information: PBD: Oct 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Classical fluids of negative heat capacity
Influence of rare-earth ionic radius on the properties of Ni- and Fe-substituted {ital R}Ba{sub 2}(Cu{sub 1{minus}{ital x}}{ital M}{sub {ital x}}){sub 3}O{sub 7{minus}{ital y}} systems ({ital R}=Y,Nd,Eu,Gd,Ho,Tm; {ital M}=Ni,Fe)