TUNNELING DENSITY OF STATES IN THE LEAD-BISMUTH-OXIDE SUPERCONDUCTORS

被引：52

作者：

SHARIFI, F ^{[1
]}

PARGELLIS, A ^{[1
]}

DYNES, RC ^{[1
]}

机构：

[1] AT&T BELL LABS,MURRAY HILL,NJ 07974

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.67.509

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed an extensive set of tunneling measurements on the high-T(c) perovskites BaPbO3, BaPb0.75Sb0.25O3, BaPb0.75Bi0.25O3, and Ba0.7K0.3BiO3. In these materials, the superconducting transition temperature varies from less than 1 to 30 K. Tunneling data show a linear background conductance similar to that observed in the cuprates and we have strong experimental evidence that this linear conductance results from intrinsic properties of the density of states in these materials. We also observe a remarkable correlation between T(c) and the slope of this linear background conductance.

引用

页码：509 / 511

页数：3

共 15 条

[1]

ALTSHULER BL, 1979, SOLID STATE COMMUN, V36, P115

[2] NORMAL TUNNELING AND NORMAL TRANSPORT - DIAGNOSTICS FOR THE RESONATING-VALENCE-BOND STATE [J].