FEATURES OF THE DENSITY OF STATES OF HIGH-TC SUPERCONDUCTORS PROBED BY VACUUM TUNNELING

被引：90

作者：

LIU, JX

WAN, JC

GOLDMAN, AM

CHANG, YC

JIANG, PZ

机构：

[1] UNIV MINNESOTA,SCH PHYS & ASTRON,MINNEAPOLIS,MN 55455

[2] ARGONNE NATL LAB,ARGONNE,IL 60439

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.67.2195

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A scanning tunneling microscope has been used to study Bi2Sr2CaCu2Ox single crystals with transition temperatures of 85 K. Images of atoms and topographical features were obtained at low temperatures and spectra were acquired in the vacuum tunneling mode. Interpretations of the conductance data suggest that 2-DELTA/k(B)T(c) almost-equal-to 8.2. Most significantly, an additional conductance peak at 90 meV, suggesting a localized state, is observed. The latter would appear to support the marginal-Fermi-liquid picture.

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页码：2195 / 2198

页数：4

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