S-WAVE SUPERCONDUCTIVITY FROM AN ANTIFERROMAGNETIC SPIN-FLUCTUATION MODEL FOR BILAYER MATERIALS

被引:70
作者
LIECHTENSTEIN, AI [1 ]
MAZIN, II [1 ]
ANDERSEN, OK [1 ]
机构
[1] CARNEGIE INST WASHINGTON,GEOPHYS LAB,WASHINGTON,DC 20015
关键词
D O I
10.1103/PhysRevLett.74.2303
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
It is usually believed that the spin-fluctuation mechanism for high-temperature superconductivity results in d-wave pairing, and that it is destructive for the conventional phonon-mediated pairing. We show that in bilayer materials, due to nearly perfect antiferromagnetic spin correlations between the planes, the stronger instability is with respect to a superconducting state whose order parameters in the even and odd plane bands have opposite signs, while having both two-dimensional s symmetry. The interaction of electrons with Raman- (infrared-) active phonons enhances (suppresses) the instability. © 1995 The American Physical Society.
引用
收藏
页码:2303 / 2306
页数:4
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