Saddle-point pairing: an electronic mechanism for superconductivity

Newns, D. M. ; Krishnamurthy, H. R. ; Pattnaik, P. C. ; Tsuei, C. C. ; Kane, C. L. (1992) Saddle-point pairing: an electronic mechanism for superconductivity Physical Review Letters, 69 (8). pp. 1264-1267. ISSN 0031-9007

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Official URL: http://prl.aps.org/abstract/PRL/v69/i8/p1264_1

Related URL: http://dx.doi.org/10.1103/PhysRevLett.69.1264

Abstract

It is shown that the interactions in a strongly correlated quasi-two-dimensional electron gas with the Fermi level lying at a saddle point (Van Hove singularity) in εk can give rise to superconductivity by exchange of excitations with a characteristic low electronic energy scale E. Application to cuprate superconductors shows that this mechanism along with a conventional electron-phonon interaction can explain the high Tc's and the anomalous behavior of the isotope shift as a function of doping.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:17524
Deposited On:16 Nov 2010 09:38
Last Modified:17 May 2016 02:08

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