Zero-bias anomaly in the tunneling spectroscopy of high-Tc superconducting films

被引：0

作者：

Kao, R.T. ^{[1
]}

Wang, S.J. ^{[1
]}

Juang, J.Y. ^{[1
]}

Wu, K.H. ^{[1
]}

Uen, T.M. ^{[1
]}

Gou, Y.S. ^{[1
]}

机构：

[1] Natl Chiao-Tung Univ, Hsinchu, Taiwan

来源：

Physica C: Superconductivity and its Applications | 1997年 / 282-287卷 / pt 3期

关键词：

Current voltage characteristics - Electron tunneling - High temperature superconductors - Oxide superconductors - Polarization - Spectroscopic analysis - Surface structure - Yttrium compounds;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The Coulomb staircase structure observed in the tunneling current-voltage characteristics (IVC's) of superconducting YBa2Cu3O7-δ (YBCO) films have been found to exhibit an extra feature of zero-bias anomaly (ZBA), with ΔV01.5ΔVn when the bias voltage exceeded a certain threshold value. Where ΔV0 and ΔVn (which remains essentially constant) are the widths of the voltage step across zero bias and other higher order steps, respectively. Comparisons made with TlBa2Ca2Cu3O9±δ(Tl-1223) films under similar conditions indicate that the effects of surface layer polarization might be the primary reason responsible for the ZBA observed in YBCO films.

引用

页码：1493 / 1494

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