SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS

TEWORDT L, Dahm T (1994)
Physica C Superconductivity 235-240: 2163-2164.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
The eigenvalues of the superconducting states of the three-band Hubbard model are calculated as functions of band-filling n, on-site repulsion U, and Cu-O repulsion V. We take full into account the momentum and energy dependence of the pairing interaction due to exchange of spin and charge fluctuations. Near the spin-density-wave instability the leading eigenvalue is that of the pairing state with d(x)2(-y)2 symmetry. This eigenvalue, lambda(d), increases rapidly and passes through unity as V is increased towards the charge-density-wave instability. The superconducting order parameter phi(d)(($) over right arrow k,omega) shows a ($) over right arrow k-dependence which deviates substantially from the simplest form cos (pi k(x)) - cos (pi k(y)), and Im phi(d)(($) over right arrow k,omega) exhibits a large and narrow peak as function of omega at the characteristic energy of the spin fluctuation mode.
Erscheinungsjahr
Zeitschriftentitel
Physica C Superconductivity
Band
235-240
Seite
2163-2164
ISSN
PUB-ID

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TEWORDT L, Dahm T. SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS. Physica C Superconductivity. 1994;235-240:2163-2164.
TEWORDT, L., & Dahm, T. (1994). SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS. Physica C Superconductivity, 235-240, 2163-2164. doi:10.1016/0921-4534(94)92303-5
TEWORDT, L., and Dahm, T. (1994). SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS. Physica C Superconductivity 235-240, 2163-2164.
TEWORDT, L., & Dahm, T., 1994. SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS. Physica C Superconductivity, 235-240, p 2163-2164.
L. TEWORDT and T. Dahm, “SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS”, Physica C Superconductivity, vol. 235-240, 1994, pp. 2163-2164.
TEWORDT, L., Dahm, T.: SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS. Physica C Superconductivity. 235-240, 2163-2164 (1994).
TEWORDT, L, and Dahm, Thomas. “SUPERCONDUCTIVITY IN AN EXTENDED HUBBARD-MODEL DUE TO SPIN AND CHARGE FLUCTUATIONS”. Physica C Superconductivity 235-240 (1994): 2163-2164.