Spin-dependent transparency of ferromagnet/superconductor interfaces

被引：59

作者：

Xia, K

Kelly, PJ

Bauer, GEW

Turek, I

机构：

[1] Univ Twente, Fac Appl Phys, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, MESA Res Inst, NL-7500 AE Enschede, Netherlands

[3] Delft Univ Technol, Dept Nanosci, NL-2628 CJ Delft, Netherlands

[4] Acad Sci Czech Republic, Inst Phys Mat, CZ-61662 Brno, Czech Republic

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.89.166603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We combine parameter-free calculations of the transmission and reflection matrices for clean and dirty interfaces with a scattering-theory formulation of Andreev reflection (AR) generalized to spin-polarized systems in order to critically evaluate the use of an extended Blonder-Tinkham-Klapwijk (BTK) model to extract values of the spin polarization for ferromagnetic metals from measurements of point-contact AR. Excellent agreement with the experimental conductance data is found for Pb/Cu but it is less good for Pb/Ni and poor for Pb/Co, indicating that the BTK formalism does not describe transport through superconducting/ferromagnetic interfaces correctly.

引用

页码：166603/1 / 166603/4

页数：4

共 23 条

[11] Probing spin polarization with Andreev reflection: A theoretical basis [J].