arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2303.02176cond-mat.supr-concond-mat.mes-hallcond-mat.str-el
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共振增强的光致超导性理论

Theory of resonantly enhanced photo-induced superconductivity

Christian J. Eckhardt, Sambuddha Chattopadhyay, Dante M. Kennes, Eugene A. Demler, Michael A. Sentef, Marios H. Michael

AI总结:

提出光或晶格振动与电子带间跃迁耦合在共振条件下可放大电子吸引力的微观机制,并设计了graphene-hBN-SrTiO$_3$异质结构以实现光致超导性。

摘要:

材料的光学驱动已成为控制其性质的多功能工具,其中光致超导性是最引人入胜的例子之一。在这项工作中,我们证明了与电子带间跃迁耦合的光或晶格振动会自然产生电子-电子吸引力,当底层玻色子被驱动到非热态时,这种吸引力可能会增强。我们发现,当将玻色子频率调谐至接近两个电子能带之间的能量差时,该现象会被共振放大。这一结果为光致超导性提供了简单的微观机制,并为设计可实现光致超导性的新平台提供了方案。我们提出了一个由graphene-hBN-SrTiO$_3$异质结构组成的具体装置,并估算了在驱动系统时可能实现的超导转变温度$T_{\ m c}$。

英文摘要:

Optical driving of materials has emerged as a versatile tool to control their properties, with photo-induced superconductivity being among the most fascinating examples. In this work, we show that light or lattice vibrations coupled to an electronic interband transition naturally give rise to electron-electron attraction that may be enhanced when the underlying boson is driven into a non-thermal state. We find this phenomenon to be resonantly amplified when tuning the boson's frequency close to the energy difference between the two electronic bands. This result offers a simple microscopic mechanism for photo-induced superconductivity and provides a recipe for designing new platforms in which light-induced superconductivity can be realized. We propose a concrete setup consisting of a graphene-hBN-SrTiO$_3$ heterostructure, for which we estimate a superconducting $T_{\rm c}$ that may be achieved upon driving the system.

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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