MOMENTUM DEPENDENCE OF THE SUPERCONDUCTING GAP IN BI2SR2CACU2O8

被引：244

作者：

DING, H

CAMPUZANO, JC

BELLMAN, AF

YOKOYA, T

NORMAN, MR

RANDERIA, M

TAKAHASHI, T

KATAYAMAYOSHIDA, H

MOCHIKU, T

KADOWAKI, K

机构：

[1] UNIV ILLINOIS,DEPT PHYS,CHICAGO,IL 60607

[2] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

[3] NATL RES INST MET,TSUKUBA,IBARAKI 305,JAPAN

[4] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1995年 / 74卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.74.2784

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We measure the momentm dependence of the superconducting gap along the Fermi surface of Bi2Sr2CaCu2O8 by high resolution angle-resolved photoemission spectroscopy. The gap is large in the vicinity of the M̄ point (where γ- M̄ is along the Cu-O bond), and small along the γ- X and γ- Y (π,π) directions. However, the gap is not zero along these directions, but, within our accuracy, becomes zero about 10 on either side of the (π,π) directions. We discuss the implications of these results for the symmetry of the order parameter. © 1995 The American Physical Society.

引用

页码：2784 / 2787

页数：4

共 12 条

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