Spin polarization in a double bend quantum wire with Rashba spin-orbit coupling

2010 ◽  
Vol 405 (17) ◽  
pp. 3581-3584
Author(s):  
Hang Li ◽  
Yuan Ping Chen ◽  
Yue E Xie ◽  
Jian Xin Zhong
Keyword(s):  
Spin Polarization ◽  
Quantum Wire ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

Persistent Spin Current in a Quantum Wire with Weak Rashba Spin–Orbit Coupling

2006 ◽  
Vol 23 (11) ◽  
pp. 3065-3068 ◽  
Author(s):  
Wang Yi ◽  
Sheng Wei ◽  
Zhou Guang-Hui
Keyword(s):  
Quantum Wire ◽  
Spin Current ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

scholarly journals Gate-tunable Rashba spin-orbit coupling and spin polarization at diluted oxide interfaces

2019 ◽  
Vol 100 (12) ◽  
Author(s):  
Yulin Gan ◽  
Yu Zhang ◽  
Dennis Valbjørn Christensen ◽  
Nini Pryds ◽  
Yunzhong Chen
Keyword(s):  
Spin Polarization ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Oxide Interfaces ◽  
Rashba Spin

SPIN CURRENT INDUCED ELECTRIC FIELD IN A RASHBA QUANTUM WIRE

2010 ◽  
Vol 24 (07) ◽  
pp. 649-656
Author(s):  
XI FU ◽  
GUANGHUI ZHOU
Keyword(s):  
Electric Field ◽  
Current Density ◽  
Quantum Wire ◽  
Spin Current ◽  
Scattering Matrix ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

We investigate theoretically the spin current and spin current induced electric field in a weak Rashba spin-orbit coupling quantum wire (QW) using a definition for spin current by means of scattering matrix. It is found that there exists two non-zero linear spin current density elements which have oscillation peaks at the center of QW and their strengths can be changed by the number of propagation modes and Rashba constant, respectively. Moreover, the spin current induced electric field has also been calculated and its strength is measurable with present technology with which can be used to detect spin current.

SPIN POLARIZATION AND TUNNELING MAGNETORESISTANCE IN FERROMAGNETIC/SEMICONDUCTOR/FERROMAGNETIC HETEROSTRUCTURE

2008 ◽  
Vol 22 (27) ◽  
pp. 2667-2676 ◽  
Author(s):  
DE LIU ◽  
HONGMEI ZHANG
Keyword(s):  
Spin Polarization ◽  
Coupling Strength ◽  
Channel Length ◽  
Ferromagnetic Semiconductor ◽  
Orbit Coupling ◽  
Tunneling Magnetoresistance ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin ◽  
Left And Right

Based on the coherent quantum transport theory, the spin polarization and tunneling magnetoresistance for polarized electrons through ferromagnetic/semiconductor/ferromagnetic (FM/SM/FM) heterostructure are studied theoretically within the Landauer framework of ballistic transport. The significant quantum size, quantum coherent, angle between the magnetic moments of the left and right ferromagnets, and Rashba spin-orbit interaction are considered simultaneously. The results indicate that the spin polarization and tunneling magnetoresistance are periodic functions of the semiconductor channel length, quasiperiodic functions of the Rashba spin-orbit coupling strength, and depend on the relative orientation of the two magnetizations in the left and right ferromagnets. A moderate angle, semiconductor channel length, and Rashba spin-orbit coupling strength allow a giant spin polarization or tunneling magnetoresistance. The results may be of relevance for the implementation of quasi-one-dimensional spin-transistor devices.

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