Spin filtering and quantum phase transition in double quantum dots attached to spin-polarized leads

2011 ◽  
Vol 22 (20) ◽  
pp. 205203 ◽  
Author(s):  
Wei-zhong Wang
Keyword(s):  
Phase Transition ◽  
Quantum Dots ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Double Quantum ◽  
Double Quantum Dots ◽  
Spin Polarized ◽  
Spin Filtering

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.

Spin-polarized transport through the T-shaped double quantum dots

2008 ◽  
Vol 17 (4) ◽  
pp. 1383-1388 ◽  
Author(s):  
Yang Fu-Bin ◽  
Wu Shao-Quan ◽  
Yan Cong-Hua ◽  
Huang Rui ◽  
Hou Tao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Double Quantum ◽  
Double Quantum Dots ◽  
Spin Polarized ◽  
Polarized Transport ◽  
Spin Polarized Transport

scholarly journals Spin-polarized conductance in double quantum dots: Interplay of Kondo, Zeeman, and interference effects

2013 ◽  
Vol 87 (20) ◽  
Author(s):  
Luis G. G. V. Dias da Silva ◽  
E. Vernek ◽  
K. Ingersent ◽  
N. Sandler ◽  
S. E. Ulloa
Keyword(s):  
Quantum Dots ◽  
Double Quantum ◽  
Interference Effects ◽  
Double Quantum Dots ◽  
Spin Polarized

Quantum Phase Transition from Superparamagnetic to Quantum Superparamagnetic State in Ultrasmall Cd1–xCr(II)xSe Quantum Dots?

2011 ◽  
Vol 134 (4) ◽  
pp. 2172-2179 ◽  
Author(s):  
Weiwei Zheng ◽  
Pushpendra Kumar ◽  
Aaron Washington ◽  
Zhenxing Wang ◽  
Naresh S. Dalal ◽  
...  
Keyword(s):  
Phase Transition ◽  
Quantum Dots ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Superparamagnetic State
Sign in / Sign up

Export Citation Format

Share Document