POINT-CONTACT TUNNELING STUDY OF HGBA2CUO4+DELTA - BCS-LIKE GAP STRUCTURE

被引：49

作者：

CHEN, J ^{[1
]}

ZASADZINSKI, JF ^{[1
]}

GRAY, KE ^{[1
]}

WAGNER, JL ^{[1
]}

HINKS, DG ^{[1
]}

机构：

[1] ARGONNE NATL LAB,TECHNOL CTR SUPERCOND,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 05期

关键词：

D O I：

10.1103/PhysRevB.49.3683

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report on point-contact tunneling into polycrystalline HgBa2CuO4+delta superconductors with a T-c onset of 97 K. Tunneling data follow the general trend of the best curves seen in cuprate high-temperature superconductors, but these show significantly lower and flatter subgap conductance values than any other cuprate and they can be reproducibly obtained. By fitting the data to a smeared BCS density of states, the energy gap has been determined and the smearing parameter is so small that it is comparable to thermal smearing.

引用

页码：3683 / 3686

页数：4

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