SUPERCONDUCTING ENERGY GAPS IN YBA2CU3O7 AND BI2SR2CACU2O8

被引：11

作者：

EKINO, T ^{[1
]}

MINAMI, T ^{[1
]}

FUJII, H ^{[1
]}

AKIMITSU, J ^{[1
]}

机构：

[1] AOYAMA GAKUIN UNIV,DEPT PHYS,SETAGAYA KU,TOKYO 157,JAPAN

来源：

PHYSICA C | 1994年 / 235卷

关键词：

D O I：

10.1016/0921-4534(94)92171-7

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report tunneling measurements of the superconducting energy gaps in YBa2Cu3O7 and Bi2Sr2CaCu2O8 using break junctions. The differential conductance dI/dV at T = 4.2 K shows no leakage around zero bias, while the gap-edge peaks in dI/dV are somewhat broadened compared to the simple BCS density of states. This strongly suggests an s-wave superconductivity with an anisotropic gap. From the best data, we obtain a result that the gap anisotropy in Bi2Sr2CaCu2O8 is larger than that in YBa2Cu3O7.

引用

页码：1899 / 1900

页数：2

共 8 条

[1] DISTRIBUTION OF SUPERCONDUCTING ENERGY GAPS IN GDBA2CU3O7 OBTAINED FROM POINT-CONTACT SPECTROSCOPY
AKIMENKO, AI
GOLL, G
VONLOHNEYSEN, H
GUDIMENKO, VA
[J]. PHYSICAL REVIEW B, 1992, 46 (10): : 6409 - 6412
[2] AMINOV BA, 1994, IN PRESS J SUPERCOND, V7
[3] SYMMETRY OF THE SUPERCONDUCTING ORDER-PARAMETER IN YBA2CU3O7-DELTA EPITAXIAL-FILMS
CHAUDHARI, P
LIN, SY
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (07) : 1084 - 1087
[4] PHONON STRUCTURES IN TUNNELING CONDUCTANCE OF SUPERCONDUCTING YBA2CU3O7
EKINO, T
AKIMITSU, J
[J]. JOURNAL OF SUPERCONDUCTIVITY, 1994, 7 (02): : 367 - 369
[5] OBSERVATION OF A-B PLANE GAP ANISOTROPY IN BI2SR2CACU2O8 WITH A LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPE
KANE, J
CHEN, Q
NG, KW
TAO, HJ
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (01) : 128 - 131
[6] ANISOTROPIC ENERGY GAPS IN COPPER-OXIDE SUPERCONDUCTORS
MAHAN, GD
[J]. PHYSICAL REVIEW B, 1989, 40 (16): : 11317 - 11319
[7] MURAKAMI H, 1994, IN PRESS ADV SUPERCO, V6
[8] OBSERVATION OF JOSEPHSON PAIR TUNNELING BETWEEN A HIGH-TC CUPRATE (YBA2CU3O7-DELTA) AND A CONVENTIONAL SUPERCONDUCTOR (PB)
SUN, AG
GAJEWSKI, DA
MAPLE, MB
DYNES, RC
[J]. PHYSICAL REVIEW LETTERS, 1994, 72 (14) : 2267 - 2270

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