论文标题
SIS的隧道连接中的微波辅助热电学
Microwave-assisted thermoelectricity in SIS' tunnel junctions
论文作者
论文摘要
事实证明，具有间隙$Δ_1>δ__2$的不对称超导隧道连接已被证明显示出特殊的非线性双极热电效应。这是由于系统中电子孔对称性的自发断裂而产生的，并且在匹配的峰偏置$ | v | = v_p =（Δ_1-Δ_2）/e $上最大化。在本文中，我们研究了光子辅助隧道（PAT）和双极热电产生的相互作用。特别是，我们展示了在匹配峰下的热电学在频率偏移的边带上的光子吸收/发射过程$ v = \ pm v_p+n \hbarΩ$，$ n \ in \ in \ mathbb {z} $支持。这代表了一种微波辅助的热电学。当将负载连接到连接点时，我们显示了多个稳定溶液的存在，与不同的光子边带相关。最后，我们讨论如何通过PAT修改非线性冷却效应。所提出的设备可以通过将温度梯度转换为热电电流或电压来检测毫米波长信号。
Asymmetric superconducting tunnel junctions with gaps $Δ_1>Δ_2$ have been proven to show a peculiar nonlinear bipolar thermoelectric effect. This arises due to the spontaneous breaking of electron-hole symmetry in the system, and it is maximized at the matching-peak bias $|V|=V_p=(Δ_1-Δ_2)/e$. In this paper, we investigate the interplay of photon-assisted tunneling (PAT) and bipolar thermoelectric generation. In particular, we show how thermoelectricity, at the matching peak, is supported by photon absorption/emission processes at the frequency-shifted sidebands $V=\pm V_p+n\hbarω$, $n \in \mathbb{Z}$. This represents a sort of microwave-assisted thermoelectricity. We show the existence of multiple stable solutions, being associated with different photon sidebands, when a load is connected to the junction. Finally, we discuss how the nonlinear cooling effects are modified by the PAT. The proposed device can detect millimeter wavelength signals by converting a temperature gradient into a thermoelectric current or voltage.
