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arXiv 2307.03314cond-mat.supr-concond-mat.mes-hall
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光致反常超流霍尔效应

Photoinduced Anomalous Supercurrent Hall Effect

A. V. Parafilo, V. M. Kovalev, I. G. Savenko

AI总结:

本研究预测含内置超流的二维常规超导体受圆偏振光照射会产生光致超流霍尔效应,建立了弱散射下的微观理论,揭示了其对称破缺机制与霍尔超流和准粒子复合时间成正比的规律。

摘要:

我们预测,在存在内置超流的各向同性常规二维超导体中,当受到圆偏振光照射时,会产生光致霍尔效应。这种相对于电磁场振幅为二阶的效应,在电磁场频率超过超导能隙两倍时发生。其表现为,在垂直于初始内置超流的方向上出现库珀对凝聚体流动,该流动的产生是为了补偿因能隙上光激发产生的准粒子所形成的光致电流。初始超流同时破坏了时间反演对称性和反演对称性,而样品中存在的稀疏散射则打破了伽利略不变性。我们建立了弱散射情形下超流霍尔效应的微观理论,并证明霍尔超流与准粒子复合时间成正比,而准粒子复合时间可以取很大的数值。

英文摘要:

We predict a photoinduced Hall effect in an isotropic conventional two-dimensional superconductor with a built-in supercurrent exposed to a circularly-polarized light. This second-order with respect to the electromagnetic field amplitude effect occurs when the frequency of the field exceeds the double value of the superconducting gap. It reveals itself in the emergence of a Cooper-pair condensate flow in the direction transverse to the initial built-in supercurrent, which arises to compensate for the light-induced electric current of quasiparticles photoexcited across the gap. The initial supercurrent breaks both the time-reversal and inversion symmetries, while the presence of dilute disorder in the sample provides the breaking of the Galilean invariance. We develop a microscopic theory of the supercurrent Hall effect in the case of weak disorder and show, that the Hall supercurrent is directly proportional to the quasiparticle recombination time, which can acquire large values.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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