Time-Dependent Thermopower Effect in an Interacting Quantum Dot
Time-Dependent Thermopower Effect in an Interacting Quantum Dot
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DOI：
10.1007/s10765-012-1181-5
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发表时间：
2012-06
影响因子：
2.2
通讯作者：
M. B. Tagani;H. Soleimani
中科院分区：
文献类型：
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作者：
M. B. Tagani;H. Soleimani
通过与时间相关的栅极电压耦合的相互作用的量子点，并在外部磁场的影响下，使用凯尔迪什非平衡格林函数形式来分析时间相关的热电势。获得了电导和热导、热电势和热电品质因数的形式表达式。研究了磁场对位移电流和热电流的影响。结果表明，尽管施加与时间相关的栅极电压会导致塞贝克系数的增强，但电子-电子相互作用会导致热电势显着降低。还分析了施加随时间变化的栅极电压导致热电势增强的原因。
The time-dependent thermopower is analyzed through an interacting quantum dot coupled to a time-dependent gate voltage and under the influence of an external magnetic field using the Keldysh nonequilibrium Green’s function formalism. Formal expressions of the electrical and thermal conductances, thermopower, and thermoelectrical figure of merit are obtained. The influence of the magnetic field on the displacement current and the heat current is studied. Results show that although applying time-dependent gate voltage results in the enhancement of the Seebeck coefficient, the electron–electron interaction gives rise to a significant reduction in the thermopower. The reason for applying time-dependent gate voltage results in the enhancement of the thermopower is also analyzed.