Spin and charge susceptibilities of the attractive hubbard chain

The spin and charge susceptibilities of the attractive Hubbard chain are obtained as a function of temperature, attractive interaction (-U) and band-filling solving numerically the thermodynamic Bethe-ansatz equations. The dominant states at low temperatures are spin-paired electrons (like Cooper-pa...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 1994-12, Vol.235, p.2159-2160
Main Author: Sacramento, P.D.
Format: Article
Language:English
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Summary:The spin and charge susceptibilities of the attractive Hubbard chain are obtained as a function of temperature, attractive interaction (-U) and band-filling solving numerically the thermodynamic Bethe-ansatz equations. The dominant states at low temperatures are spin-paired electrons (like Cooper-pairs). The spin susceptibility is vanishingly small due to the spin gap and at half-filling it decreases with U. On the other hand, the charge susceptibility at half-filling increases with U and shows a maximum as a function of the band-filling, at constant T, which increases as T lowers and that shifts towards smaller values of the band-filling.
ISSN:0921-4534
1873-2143
DOI:10.1016/0921-4534(94)92301-9