Spin separation via a three-terminal Aharonov-Bohm interferometers

被引：67

作者：

Chi, Feng ^{[1
]}

Zheng, Jun ^{[1
]}

机构：

[1] Bohai Univ, Dept Phys, Jinzhou 121000, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 06期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2857471

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We propose a three-terminal ring-type device which contains a single-level quantum dot (QD) to extract or separate the spin-up and the spin-down electrons that are injected into the QD from a middle lead, into the left and the right leads, respectively. This scheme is based on the Rashba spin-orbit interaction (RSOI) in the bridge between the left and the right leads and is free from magnetic field or magnetic material. We find that both the spin directions and the magnitude of the outflow currents in the left and the right leads can be tuned by the RSOI strength and the structure parameters. (c) 2008 American Institute of Physics.

引用

页数：3

共 35 条

[21] Nonequilibrium transport through double quantum dots:: Kondo effect versus antiferromagnetic coupling -: art. no. 136802 [J].

López, R ;

Aguado, R ;

Platero, G .

PHYSICAL REVIEW LETTERS, 2002, 89 (13) :136802-136802

[22] Fano effect through parallel-coupled double Coulomb islands [J].

Lu, Haizhou ;

Lu, Rong ;

Zhu, Bang-fen .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2006, 18 (39) :8961-8972

[23] Tunable Fano effect in parallel-coupled double quantum dot system -: art. no. 235320 [J].

Lu, HZ ;

Lü, R ;

Zhu, BF .

PHYSICAL REVIEW B, 2005, 71 (23)

[24] Ballistic spin-polarized transport and Rashba spin precession in semiconductor nanowires [J].

Mireles, F ;

Kirczenow, G .

PHYSICAL REVIEW B, 2001, 64 (02)

[25] Dissipationless quantum spin current at room temperature [J].

Murakami, S ;

Nagaosa, N ;

Zhang, SC .

SCIENCE, 2003, 301 (5638) :1348-1351

[26]

Nitta J, 1997, PHYS REV LETT, V78, P1335, DOI 10.1103/PhysRevLett.78.1335

[27] Controlling Fano and Dicke effects via a magnetic flux in a two-site Anderson model [J].

Orellana, PA ;

de Guevara, MLL ;

Claro, F .

PHYSICAL REVIEW B, 2004, 70 (23) :1-4

[28]

Rashba E. I, 1960, FIZ TVERD TELA, V2, P1224

[29] Modulating unpolarized current in quantum spintronics: Visibility of spin-interference effects in multichannel Aharonov-Casher mesoscopic rings [J].

Souma, S ;

Nikolic, BK .

PHYSICAL REVIEW B, 2004, 70 (19) :1-11

[30] Spontaneous spin-polarized current in a nonuniform Rashba interaction system [J].

Sun, QF ;

Xie, XC .

PHYSICAL REVIEW B, 2005, 71 (15)

← 1 2 3 4 →