OBSERVATION OF A-B PLANE GAP ANISOTROPY IN BI2SR2CACU2O8 WITH A LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPE

被引：83

作者：

KANE, J ^{[1
]}

CHEN, Q ^{[1
]}

NG, KW ^{[1
]}

TAO, HJ ^{[1
]}

机构：

[1] CHINESE ACAD SCI,INST PHYS,BEIJING,PEOPLES R CHINA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.72.128

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Significant gap anisotropy within the a-b plane of Bi2Sr2CaCu2O8 has been observed with a low temperature scanning tunneling microscope. The energy gap is largest along the a-axis direction, with DELTA(p-p) = 36.6 meV and decreases gradually to a value of 23 meV along the direction 45-degrees from the a axis. The tunneling data have been fit well using a simple model which assumes a d-wave-pairing energy gap, and allows tunneling in all directions close to the normal of the surface.

引用

收藏

页码：128 / 131

页数：4

相关论文

共 26 条

[1] DETECTION OF AN ANISOTROPY OF THE SUPERCONDUCTING GAP IN BI2SR2CACU2O8+DELTA SINGLE-CRYSTALS BY RAMAN AND TUNNELING SPECTROSCOPY [J].

BOEKHOLT, M ;

HOFFMANN, M ;

GUNTHERODT, G .

PHYSICA C, 1991, 175 (1-2) :127-134

[2] TUNNELING SPECTROSCOPY IN BI2SR2CACU2O8 - IS THE ENERGY-GAP ANISOTROPIC [J].

BRICENO, G ;

ZETTL, A .

SOLID STATE COMMUNICATIONS, 1989, 70 (11) :1055-1058

[3] INTERLAYER TUNNELING AND GAP ANISOTROPY IN HIGH-TEMPERATURE SUPERCONDUCTORS [J].

CHAKRAVARTY, S ;

SUDBO, A ;

ANDERSON, PW ;

STRONG, S .

SCIENCE, 1993, 261 (5119) :337-340

[4] OBSERVATION OF LARGE TUNNELING-CONDUCTANCE VARIATIONS IN DIRECT MAPPING OF THE ENERGY-GAP OF SINGLE-CRYSTAL BI2SR2CACU2O8-X [J].

CHANG, A ;

RONG, ZY ;

IVANCHENKO, YM ;

LU, FR ;

WOLF, EL .

PHYSICAL REVIEW B, 1992, 46 (09) :5692-5698

[5] GAP ANISOTROPY OF BI2SR2CACU2O8 MEASURED BY LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPY [J].

CHEN, Q ;

NG, KW .

PHYSICAL REVIEW B, 1992, 45 (05) :2569-2572

[6] QUASI-PARTICLE DECAY EFFECTS IN THE SUPERCONDUCTING DENSITY OF STATES - EVIDENCE FOR D-WAVE PAIRING IN THE CUPRATES [J].

COFFEY, D ;

COFFEY, L .

PHYSICAL REVIEW LETTERS, 1993, 70 (10) :1529-1532

[7] TRANSPORT AND TUNNELING IN BI2SR2CACU2O8-X [J].

CROMMIE, MF ;

BRICENO, G ;

ZETTL, A .

PHYSICA C, 1989, 162 (pt2) :1397-1400

[8] ANOMALOUS SPECTRAL WEIGHT TRANSFER AT THE SUPERCONDUCTING TRANSITION OF BI2SR2CACU2O8+DELTA [J].

DESSAU, DS ;

WELLS, BO ;

SHEN, ZX ;

SPICER, WE ;

ARKO, AJ ;

LIST, RS ;

MITZI, DB ;

KAPITULNIK, A .

PHYSICAL REVIEW LETTERS, 1991, 66 (16) :2160-2163

[9] REPRODUCIBLE TUNNELING DATA ON CHEMICALLY ETCHED SINGLE-CRYSTALS OF YBA2CU3O7 [J].

GURVITCH, M ;

VALLES, JM ;

CUCOLO, AM ;

DYNES, RC ;

GARNO, JP ;

SCHNEEMEYER, LF ;

WASZCZAK, JV .

PHYSICAL REVIEW LETTERS, 1989, 63 (09) :1008-1011

[10] ATOMICALLY RESOLVED STM/STS OBSERVATION ON THE EDGE OF CUO2 AND (BIO)2 LAYERS OF BI-SR-CA-CU-O [J].

HASEGAWA, T ;

KITAZAWA, K .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1990, 29 (03) :L434-L437