ENERGY-GAP STRUCTURE IN BILAYER OXIDE SUPERCONDUCTORS

被引：15

作者：

KUBOKI, K ^{[1
]}

LEE, PA ^{[1
]}

机构：

[1] KOBE UNIV, DEPT PHYS, KOBE 657, JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1995年 / 64卷 / 09期

关键词：

INTERLAYER PAIRING; ARPES; SPONTANEOUS LATTICE DISTORTION; RAMAN SCATTERING; TIME-REVERSAL SYMMETRY BREAKING;

D O I：

10.1143/JPSJ.64.3179

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider a model for bilayer superconductors where an interlayer pairing amplitude Delta(perpendicular to) coexists with intralayer pairing Delta(parallel to) of d(x2-y2) symmetry. This model is motivated by a recent photoemission experiment reporting the splitting of the nodes of the energy gap. In addition to offering a natural explanation of this observation, the model has a number of new experimental consequences. We find that the new state is accompanied by a spontaneous breaking of the tetragonal symmetry. We also find that the out-of-phase oscillation of Delta(perpendicular to) and Delta(parallel to) gives rise to a new Raman active mode. The phase of Delta(perpendicular to) may also become imaginary, leading to a state which breaks time reversal symmetry, which may have important implications for tunnelling experiments.

引用

页码：3179 / 3183

页数：5

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