Topological insulator-graphene junction for spin transport

2012 ◽  
Vol 101 (24) ◽  
pp. 243102 ◽  
Author(s):  
H. Li ◽  
H. B. Zhang ◽  
J. M. Shao ◽  
Y. Y. Zhang ◽  
D. X. Yao ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Spin Transport

scholarly journals Accessing the Intrinsic Spin Transport in a Topological Insulator by Controlling the Crossover of Bulk-to-Surface Conductance

2018 ◽  
Vol 121 (17) ◽  
Author(s):  
Wonhee Ko ◽  
Giang D. Nguyen ◽  
Hoil Kim ◽  
Jun Sung Kim ◽  
X.-G. Zhang ◽  
...  
Keyword(s):  
Topological Insulator ◽  
Spin Transport ◽  
Surface Conductance

scholarly journals Coherent spin transport through helical edge states of topological insulator

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
R. A. Niyazov ◽  
D. N. Aristov ◽  
V. Yu. Kachorovskii
Keyword(s):  
Magnetic Field ◽  
High Temperature ◽  
Topological Insulator ◽  
Spin Transport ◽  
Magnetic Impurity ◽  
Quantum Calculations ◽  
Edge States ◽  
Level Spacing ◽  
Aharonov Bohm ◽  
Coherent Spin

AbstractWe study coherent spin transport through helical edge states of topological insulator tunnel-coupled to metallic leads. We demonstrate that unpolarized incoming electron beam acquires finite polarization after transmission through such a setup provided that edges contain at least one magnetic impurity. The finite polarization appears even in the fully classical regime and is therefore robust to dephasing. There is also a quantum magnetic field-tunable contribution to the polarization, which shows sharp identical Aharonov-Bohm resonances as a function of magnetic flux—with the period hc/2e—and survives at relatively high temperature. We demonstrate that this tunneling interferometer can be described in terms of ensemble of flux-tunable qubits giving equal contributions to conductance and spin polarization. The number of active qubits participating in the charge and spin transport is given by the ratio of the temperature and the level spacing. The interferometer can effectively operate at high temperature and can be used for quantum calculations. In particular, the ensemble of qubits can be described by a single Hadamard operator. The obtained results open wide avenue for applications in the area of quantum computing.

scholarly journals Optically tunable spin transport on the surface of a topological insulator

2016 ◽  
Vol 18 (10) ◽  
pp. 103014 ◽  
Author(s):  
D Yudin ◽  
O V Kibis ◽  
I A Shelykh
Keyword(s):  
Topological Insulator ◽  
Spin Transport
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