arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2003.05319cond-mat.mes-hall
收藏

驱动腔中的光致电子对

Photo-induced electron pairing in a driven cavity

Hongmin Gao, Frank Schlawin, Michele Buzzi, Andrea Cavalleri, Dieter Jaksch

摘要:

我们演示了如何通过双光子过程的腔内激光光子的虚拟散射可以诱导可控的远程电子相互作用在二维材料。我们表明,激光是红色(蓝色)失谐的腔产生吸引(排斥)的相互作用,其强度成正比的激光强度。此外,我们发现,除了在非常低的频率,相互作用没有有效地筛选。对于现实的腔参数,激光诱导加热的非弹性光子散射的电子被抑制和相干电子相互作用占主导地位。当相互作用是有吸引力的,它们会导致在库珀通道中的不稳定性,温度与驱动强度的平方根成正比。我们的研究结果提供了一种新的路线,工程电子相互作用在广泛的二维材料,包括AB堆叠的双层石墨烯和导电界面之间的LaAlO3和SrTiO 3。

英文摘要:

We demonstrate how virtual scattering of laser photons inside a cavity via two-photon processes can induce controllable long-range electron interactions in two-dimensional materials. We show that laser light that is red(blue)-detuned from the cavity yields attractive(repulsive) interactions, whose strength is proportional to the laser intensity. Furthermore, we find that the interactions are not screened effectively except at very low frequencies. For realistic cavity parameters, laser-induced heating of the electrons by inelastic photon scattering is suppressed and coherent electron interactions dominate. When the interactions are attractive, they cause an instability in the Cooper channel at a temperature proportional to the square root of the driving intensity. Our results provide a novel route for engineering electron interactions in a wide range of two-dimensional materials including AB-stacked bilayer graphene and the conducting interface between LaAlO3 and SrTiO3.

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。

↑