scholarly journals Quantum interference and spin polarization on Rashba double quantum dots embedded in a ring

2008 ◽  
Vol 78 (23) ◽  
Author(s):  
Kuo-Wei Chen ◽  
Ching-Ray Chang
Keyword(s):  
Quantum Dots ◽  
Spin Polarization ◽  
Quantum Interference ◽  
Double Quantum ◽  
Double Quantum Dots

Quantum interference through parallel-coupled Double Quantum Dots

2007 ◽  
Vol 4 (2) ◽  
pp. 574-577 ◽  
Author(s):  
Haizhou Lu ◽  
Zuo-zi Chen ◽  
Rong Lü ◽  
Bang-fen Zhu
Keyword(s):  
Quantum Dots ◽  
Quantum Interference ◽  
Double Quantum ◽  
Double Quantum Dots

Influence of inter-dot coupling on spin polarization of carriers in double quantum dots

2004 ◽  
Vol 19 (9) ◽  
pp. 1125-1130 ◽  
Author(s):  
S Lee ◽  
S-R Eric Yang ◽  
M Dobrowolska ◽  
J K Furdyna
Keyword(s):  
Quantum Dots ◽  
Spin Polarization ◽  
Double Quantum ◽  
Double Quantum Dots

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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