Induced spin-accumulation and spin-polarization in a quantum-dot ring by using magnetic quantum dots and Rashba spin-orbit effect

2014 ◽  
Vol 115 (20) ◽  
pp. 204305 ◽  
Author(s):  
L. Eslami ◽  
E. Faizabadi
Keyword(s):  
Quantum Dots ◽  
Quantum Dot ◽  
Spin Polarization ◽  
Spin Accumulation ◽  
Spin Orbit ◽  
Rashba Spin ◽  
Magnetic Quantum Dots

Spin accumulation in the parallel-coupled double quantum dots with Rashba spin-orbit interaction connected with ferromagnetic and superconducting electrodes

2015 ◽  
Vol 29 (25) ◽  
pp. 1550145
Author(s):  
Cheng-Zhi Ye ◽  
Wei-Tao Lu ◽  
Chang-Tan Xu
Keyword(s):  
Quantum Dots ◽  
Spin Polarization ◽  
Energy Levels ◽  
Orbit Interaction ◽  
Double Quantum ◽  
Spin Accumulation ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Double Quantum Dots ◽  
Rashba Spin

Using the standard nonequilibrium Green’s function techniques, we investigate the effect of Rashba spin-orbit interaction (RSOI) and ferromagnetic electrode on the spin accumulation in the parallel-coupled double quantum dots coupled with a ferromagnetic and a superconducting electrode. It is demonstrated that FM electrode cannot induce the spin polarization of Andreev reflection (AR) current, but can induce the spin accumulation in the QDs. However, RSOI can lead to the spin polarization of AR current as well as the spin accumulation in the QDs. In the existence of RSOI, complete spin-polarized QD can be achieved with negative bias voltage [Formula: see text], which is the most significant advantage of our device. When energy levels [Formula: see text] and the interdot coupling strength [Formula: see text], the maximum value of spin accumulation in this paper is obtained as 0.7. The results may be useful on the design of spintronic devices.

Spin polarization in a double-quantum dot interferometer with Rashba spin–orbit interaction

2012 ◽  
Vol 85 (5) ◽  
pp. 055704
Author(s):  
Xiao-Jie Liu ◽  
Xue-Yang Zhao ◽  
Xiao-Fei Wang ◽  
Hui-Jie Xue ◽  
Li-Feng Feng ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Orbit Interaction ◽  
Double Quantum ◽  
Spin Orbit ◽  
Spin Orbit Interaction ◽  
Double Quantum Dot ◽  
Rashba Spin
Sign in / Sign up

Export Citation Format

Share Document