Extrinsic thermoelectric response of coherent conductors,Physical Review B

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Extrinsic thermoelectric response of coherent conductors
Physical Review B ( IF 3.2 ) Pub Date : 2021-09-27 , DOI: 10.1103/physrevb.104.115430
Rafael Sánchez ₁ , Cosimo Gorini _{2,

3} , Geneviève Fleury ₃

Affiliation

We investigate the thermoelectric response of a coherent conductor in contact with a scanning probe. Coupling to the probe has the dual effect of allowing for the controlled local injection of heat currents into the system and of inducing interference patterns in the transport coefficients. This is sufficient to generate a multiterminal thermoelectric effect even if the conductor does not effectively break electron-hole symmetry and the tip injects no charge. Considering a simple model for noninteracting electrons, we find a nonlocal thermoelectric response which is modulated by the position of the hot probe tip, and a nonreciprocal longitudinal response which leads to a thermoelectric diode effect. A separate investigation of the effects of dephasing and of quasielastic scattering gives further insights into the different mechanisms involved.

中文翻译：

相干导体的外在热电响应

我们研究了与扫描探针接触的相干导体的热电响应。耦合到探头具有双重效果，允许受控的局部热流注入系统和在传输系数中引起干扰模式。即使导体没有有效地破坏电子 - 空穴对称性并且尖端没有注入电荷，这也足以产生多端热电效应。考虑到非相互作用电子的简单模型，我们发现了由热探针尖端的位置调制的非局部热电响应，以及导致热电二极管效应的非互易纵向响应。对移相和准弹性散射的影响进行单独研究，可以进一步了解所涉及的不同机制。

更新日期：2021-09-28

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