Theory of Josephson transport through spintronics nano-structures

被引：10

作者：

Kawabata, Shiro ^{[1
,2
]}

Asano, Yasuhiro ^{[3
]}

Tanaka, Yukio ^{[4
]}

Kashiwaya, Satoshi ^{[5
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, NRI, Tsukuba, Ibaraki 3058568, Japan

[2] Japan Sci & Technol Corp JST, CREST, Kawaguchi, Saitama 3320012, Japan

[3] Hokkaido Univ, Dept Appl Phys, Sapporo, Hokkaido, Japan

[4] Nagoya Univ, Dept Appl Phys, Nagoya, Aichi 464, Japan

[5] Natl Inst Adv Ind Sci & Technol, NeRI, Tsukuba, Ibaraki 3058568, Japan

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 04期

关键词：

Josephson junction; Spintronics; Ferromagnetic insulator; Quantum bit; JUNCTIONS; DYNAMICS;

D O I：

10.1016/j.physe.2009.11.102

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We study the Josephson transport through ferromagnetic insulators (FIs) by taking into account its band structure explicitly. In the case of the fully polarized FIs (FPFIs), we found the formation of a pi-junction and an atomic-scale 0-pi transition induced by increasing the FI thickness. More remarkably, in the Josephson junction through spin-filter materials such as Eu chalcogenides, the orbital hybridization between the conduction d and the localized f electron gives rise to the pi-junction behavior. Such FI-based pi-junctions can be used to implement highly coherent solid-state quantum bits. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：1010 / 1013

页数：4

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