418 research outputs found
Exponential and power-law probability distributions of wealth and income in the United Kingdom and the United States
Lorenz curve, Gini coefficient, family income
Hopf Term for a Two-Dimensional Electron Gas
In this Comment on the paper by W. Apel and Yu. A. Bychkov, cond-mat/9610040
and Phys. Rev. Lett. 78, 2188 (1997), we draw attention to our prior
microscopic derivations of the Hopf term for various systems and to
shortcomings of the Apel-Bychkov derivation. We explain how the value of the
Hopt term prefactor is expressed in terms of a topological invariant
in the momentum space and the quantized Hall conductivity of the system. (See
also related paper cond-mat/9703195)Comment: RevTeX, 1 page, no figure
Curie law, entropy excess, and superconductivity in heavy fermion metals and other strongly interacting Fermi liquids
Low-temperature thermodynamic properties of strongly interacting Fermi
liquids with fermion condensate are investigated. We demonstrate that the spin
susceptibility of these systems exhibits the Curie-Weiss law, and the entropy
contains a temperature-independent term. The excessive entropy is released at
the superconducting transition, enhancing the specific heat jump Delta C and
rendering it proportional to the effective Curie constant. The theoretical
results are favorably compared with the experimental data on the heavy fermion
metal CeCoIn5, as well as He-3 films.Comment: 4 pages, 2 figures. V.2: a reference added; minor changes as in the
published versio
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