A single-spin-current thermal generator
A single-spin-current thermal generator
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单自旋流热发电机
DOI:
10.1063/1.4739292
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发表时间:
2012-07
影响因子:
3.2
通讯作者:
Chi, F.
中科院分区:
文献类型:
--
作者:
Liu, Y. S.;Yang, X. F.;Hong, X. K.;Chi, F.
We theoretically propose a single-spin-current thermal generator consisting of a Rashba quantum dot (QD), one hot electrode and two cold electrodes. The Rashba QD is directly coupled to the three electrodes, and there exists a bridge channel between the two cold electrodes. Our results show the QD device can be used to generate pure spin-up or spin-down currents in cold electrodes in the absence of bias voltages and magnetic materials. The underlying reason is a cooperative effect of the spin-dependent quantum interference effects originating from Rashba spin-orbit interaction in the QD and temperature gradients among the three electrodes. The working conditions for the single-spin-current thermal generator are also clearly presented. Moreover, we also find that the device can be converted from n-type to p-type or vice versa by a gate voltage.
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通讯作者:
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