Superconducting fluctuations in the hubbard model with an attractive on-site interaction in one dimension

The low-temperature thermodynamics of the one-dimensional Hubbard model with attractive on-site interaction of the electrons is discussed within the framework of the Bethe ansatz for the wave function. At low T the dominant states consist of spin-paired electrons (Cooper-pair-like) and excitations o...

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Bibliographic Details
Published in:Journal of applied physics 1990-05, Vol.67 (9), p.5740-5742
Main Authors: SCHLOTTMANN, P, KONG-JU-BOCK LEE
Format: Article
Language:English
Subjects:
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Condensed matter: electronic structure, electrical, magnetic, and optical properties
CORRELATION FUNCTIONS
ENERGY-LEVEL TRANSITIONS
Exact sciences and technology
EXCITATION
FUNCTIONS
ONE-DIMENSIONAL CALCULATIONS
PHYSICAL PROPERTIES
Physics
SPECIFIC HEAT
Superconductivity
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES 656100 > Condensed Matter Physics-- Superconductivity
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Summary:The low-temperature thermodynamics of the one-dimensional Hubbard model with attractive on-site interaction of the electrons is discussed within the framework of the Bethe ansatz for the wave function. At low T the dominant states consist of spin-paired electrons (Cooper-pair-like) and excitations of such pairs (without breaking up the singlet bound states). A critical field Hc (energy required to depair a Cooper pair) is obtained at T=0 (note that the superconducting Tc =0), which disappears for T≠0. There is no magnetic response at T=0 for H
ISSN:0021-8979
1089-7550
DOI:10.1063/1.345948