Jarrell, Mark ; Krishnamurthy, H. R. ; Cox, D. L. (1998) Charge-transfer mechanisms for high-Tc superconductivity Physical Review B, 38 (7). pp. 4584-4587. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v38/i7/p4584_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.38.4584
Abstract
We report results from a Bardeen-Cooper-Schrieffer (BCS) analysis of the Weber d-d exciton model of the high-temperature superconductors. The pairing between oxygen holes is mediated by localized intrasite Cu orbitals. For reasonable oxygen on-site Coulomb energies, we find s-wave superconductivity for low filling fraction (<0.44), and d-wave superconductivity for larger filling. The same symmetry analysis applies to a localized version of the intersite Cu-O charge-transfer model of Varma, Schmitt-Rink, and Abrahams. We explore the limitations imposed by the Weber model symmetry, and interpret optical data based upon the d-d exciton picture. We briefly discuss the suppression of antiferromagnetism of the Cu moments by the Ruderman-Kittel-Kasuya-Yoshida interaction in the metallic limit.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 17566 |
| Deposited On: | 16 Nov 2010 09:32 |
| Last Modified: | 04 Jun 2011 09:51 |
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