Thermally driven pure spin current through an interacting quantum dot
PHYSICS LETTERS A(2020)
摘要
We study spin-dependent electron transport properties of a thermally driven interacting quantum dot. When an external magnetic field is applied to the quantum dot, the effective transmissions of spin-up and spin-down electrons are separated from each other and have a perfect mirror symmetry with respect to the incident energy at a certain gate voltage. A pure spin current can be induced in the system and modulated by a magnetic field. Under certain magnetic field strengths, a larger pure spin current can be obtained at gate voltages with the values in a range, not just at a specific voltage. These results indicate that the system can be worked as a pure spin current generator. (C) 2020 Elsevier B.V. All rights reserved.
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关键词
Quantum dot,Spin current,Magnetic field
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