STUDY OF YBCO AU SURFACE USING LOW-TEMPERATURE SCANNING TUNNELING MICROSCOPY SCANNING TUNNELING SPECTROSCOPY

被引：8

作者：

KOYANAGI, M

KASHIWAYA, S

AKOH, H

KOHJIRO, S

MATSUDA, M

HIRAYAMA, F

KAJIMURA, K

机构：

[1] Electrotechnical Laboratory, Tsukuba-shi, Ibaraki

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS | 1992年 / 31卷 / 11期

关键词：

OXIDE SUPERCONDUCTOR; TUNNELING SPECTROSCOPY; STM/STS; PROXIMITY EFFECT; ZERO-BIAS CONDUCTANCE PEAK;

D O I：

10.1143/JJAP.31.3525

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A low-temperature scanning tunneling microscope (LTSTM) has been used to study the surface electronic state of a 30-nm-thick Au film deposited on (103)-oriented YBCO thin film. Conductance spectra with the BCS-like dip induced by the superconductivity proximity effect were observed in a small area. Also, spectra with zero-bias conductance peaks were observed in another limited area. Most parts of the areas studied showed constant conductance spectra. Since this fact suggests the existence of a degraded layer on most surfaces of the YBCO film, the Josephson coupling in YBCO/Au/Nb is assumed to occur primarily in this degraded layer.

引用

收藏

页码：3525 / 3528

页数：4

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