scholarly journals Optically induced spin polarization of an electric current through a quantum dot

2005 ◽  
Vol 71 (16) ◽  
Author(s):  
Anatoly Yu. Smirnov ◽  
Lev G. Mourokh
Keyword(s):  
Quantum Dot ◽  
Electric Current ◽  
Spin Polarization ◽  
Optically Induced

scholarly journals Topological isoconductance signatures in Majorana nanowires

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. S. Ricco ◽  
J. E. Sanches ◽  
Y. Marques ◽  
M. de Souza ◽  
M. S. Figueira ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Transport Properties ◽  
Spin Polarization ◽  
Bound States ◽  
Spin Asymmetry ◽  
Experimental Protocol ◽  
Zero Bias ◽  
Topological Superconductor ◽  
Hybrid Device ◽  
Majorana Bound States

AbstractWe consider transport properties of a hybrid device composed by a quantum dot placed between normal and superconducting reservoirs, and coupled to a Majorana nanowire: a topological superconducting segment hosting Majorana bound states (MBSs) at the opposite ends. It is demonstrated that if highly nonlocal and nonoverlapping MBSs are formed in the system, the zero-bias Andreev conductance through the dot exhibits characteristic isoconductance profiles with the shape depending on the spin asymmetry of the coupling between the dot and the topological superconductor. Otherwise, for overlapping MBSs with less degree of nonlocality, the conductance is insensitive to the spin polarization and the isoconductance signatures disappear. This allows to propose an alternative experimental protocol for probing the nonlocality of the MBSs in Majorana nanowires.

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-dependent transport in a quantum dot array coupled with an Aharonov—Bohm ring

2010 ◽  
Vol 19 (12) ◽  
pp. 127202 ◽  
Author(s):  
Rui Wang ◽  
Ling-Min Kong ◽  
Yun-Qing Zhou ◽  
Cun-Xi Zhang ◽  
Zhi-Yong Xing
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Dependent Transport ◽  
Aharonov Bohm

Quantum Dot Nanodevice with Electron-Lattice Coupling

2008 ◽  
Vol 1108 ◽  
Author(s):  
Karel Král
Keyword(s):  
Quantum Dot ◽  
Electric Current ◽  
Excited States ◽  
Longitudinal Optical ◽  
Lattice Vibrations ◽  
Electronic Current ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Lattice Coupling ◽  
Higher Excited States

AbstractThe electronic current-voltage characteristics of a nanotransistor is studied. The nanotransistor is assumed to consist of a quantum dot active region connected to the source and drain wires and also attached to a gate. The electric current is shown to be influenced by the coupling of electrons to the longitudinal optical phonons, namely, by the up-conversion of the electrons to the higher excited states in a quantum dot, due to a nonadiabatic effect of the lattice vibrations. In the nanotransistor with asymmetric source and drain contacts the up-conversion leads to a spontaneous electric current, or to a spontaneous voltage between the electrodes. We remind existing experiments which might be related to the effect considered.

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
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