Doubling of the bands in overdoped Bi2Sr2CaCu2O8+δ:: Evidence for c-axis bilayer coupling -: art. no. 117002

被引：121

作者：

Chuang, YD ^{[1
]}

Gromko, AD

Fedorov, A

Aiura, Y

Oka, K

Ando, Y

Eisaki, H

Uchida, SI

Dessau, DS

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

[3] Electrotech Lab, Tsukuba, Ibaraki 3058568, Japan

[4] Cent Res Inst Elect Power Ind, Tokyo 2018511, Japan

[5] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 113, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 11期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.87.117002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present high resolution angle resolved photoemission data of the bilayer superconductor Bi2Sr2CaCu2O8+delta (Bi2212) showing a clear doubling of the near E-F bands. This splitting approaches zero along the (0, 0) - (pi, pi) nodal line and is not observed in single layer Bi2Sr2CuO6+delta (Bi2201), indicating that the splitting is due to the long sought after bilayer splitting effect. The splitting has a magnitude of approximately 75 meV near the middle of the zone, extrapolating to about 110 meV near the (pi, 0) point. The existence of these two bands also helps to clear up the recent controversy concerning the topology of the Fermi surface.

引用

页码：117002 / 1

页数：4

共 22 条

[1] COMPLETE FERMI-SURFACE MAPPING OF BI2SR2CACU2O8+X (001) - COEXISTENCE OF SHORT-RANGE ANTIFERROMAGNETIC CORRELATIONS AND METALLICITY IN THE SAME PHASE [J].