Coulomb-modified spin polarization in a four-terminal parallel double-quantum-dot structure

2009 ◽  
Vol 105 (3) ◽  
pp. 033708 ◽  
Author(s):  
Weijiang Gong ◽  
Yisong Zheng
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Double Quantum ◽  
Double Quantum Dot

Magnetically tunable spin-polarization of the current through a double quantum dot device

2008 ◽  
Vol 148 (1-2) ◽  
pp. 69-73 ◽  
Author(s):  
Hui Pan ◽  
Cong Wang ◽  
Su-Qing Duan ◽  
Wei-Dong Chu ◽  
Wei Zhang
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Double Quantum ◽  
Double Quantum Dot

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

Modulation of magnetotransport in asymmetrically coupled double quantum dot system

2016 ◽  
Vol 30 (22) ◽  
pp. 1650266 ◽  
Author(s):  
Yan-Hua Liao ◽  
Jin Huang ◽  
Wei-Zhong Wang
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Dots ◽  
Energy Level ◽  
Quantum Dot ◽  
Spin Polarization ◽  
Quantum Phase Transition ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Double Quantum Dots

We study the transport properties in double quantum dots asymmetrically coupled to leads in magnetic field. We focus on the situation in which the second dot (QD2) couples with the leads with a weak hybridization function. The results shows that by tuning the energy level [Formula: see text] of QD2 one can control the conductance and its spin polarization of the system. In the absence of magnetic field [Formula: see text], with increasing [Formula: see text], the conductance shows a dip structure. This behavior of conductance results from a continuous triplet–doublet quantum phase transition. In the presence of magnetic field [Formula: see text], we obtain a perfect spin filtering with a fully-polarized conductance of up-spin or down-spin.

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