Spin-thermoelectric transport induced by interactions and spin-flip processes in two-dimensional topological insulators

Article

关键词: HGTE QUANTUM-WELLS;    LUTTINGER LIQUID;    EDGE STATES;    CALORITRONICS;    BOSONIZATION;    COHERENT;    BARRIERS;    CHARGE;   

DOI  :  10.1103/PhysRevB.93.165414

来源: SCIE

【 摘 要 】

We consider thermoelectric transport properties of the edge states of a two-dimensional topological insulator in a double quantum point contact geometry coupled to two thermally biased reservoirs. Both spin-preserving and spin-flipping tunneling processes between opposite edges are analyzed in the presence of electron-electron interactions. We demonstrate that the simultaneous presence of spin-flipping processes and interactions gives rise to a finite longitudinal spin current. Moreover, its sign and amplitude can be tuned by means of gate voltages with the possibility to generate a pure spin current, with a vanishing charge current.

【 授权许可】

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