Spin-polarized transport across a La0.7Sr0.3MnO3/YBa2Cu3O7-x interface:: Role of Andreev bound states -: art. no. 212508

被引：62

作者：

Chen, ZY ^{[1
]}

Biswas, A

Zutic, I

Wu, T

Ogale, SB

Greene, RL

Venkatesan, T

机构：

[1] Univ Maryland, Dept Phys, Ctr Supercond Res, College Pk, MD 20742 USA

[2] Univ Maryland, Dept Elect Engn, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2001年 / 63卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.63.212508

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transport across an La0.7Sr0.3MnO3 /YBa2Cu3O7-x (LSMO/YBCO) interface is studied as a function of temperature and surface morphology. For comparison, control measurements are performed in nonmagnetic heterostructures of LaNiO3/YBCO and Ag/YBCO. In all cases, YBCO is used as bottom layer to eliminate the channel resistance and to minimize thermal effects. The observed differential conductance reflects the role of Andreev bound states in the a-b plane, and displays the suppression of such states by the spin-polarized transport across the interface. The theoretical analysis of the measured data reveals decay of the spin polarization near the LSMO surface with temperature, consistent with the reported photoemission data.

引用

页数：4

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