Absence of Andreev reflections and Andreev bound states above the critical temperature

被引：41

作者：

Dagan, Y ^{[1
]}

Kohen, A

Deutscher, G

Revcolevschi, A

机构：

[1] Tel Aviv Univ, Raymond & Beverly Sackler Fac Exact Sci, Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[2] Univ Paris Sud, Lab Chim Solides, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.61.7012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present measurements of the temperature dependence of the differential conductance of normal-metal/underdoped high-T-c superconductors contacts. Both Y1Ba2Cu3O7-x thin films and La2-xSrxCuO4 single crystals were studied. The effect of direct Andreev reflections, or of Andreev bound states, do not persist above the critical temperature. Our results are consistent with an Andreev energy scale that does not follow the doping dependence of the pseudogap, but rather that of the critical temperature.

引用

页码：7012 / 7016

页数：5

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