论文标题

电子浮雕液晶

Electronic Floquet Liquid Crystals

论文作者

Esin, Iliya, Gupta, Gaurav Kumar, Berg, Erez, Rudner, Mark S., Lindner, Netanel H.

论文摘要

“ Floquet Engineering” - 通过应用连贯的时间周期驱动器设计乐队结构“按需”最近成为创建物质的新拓扑和异常阶段的强大工具。在本手稿中,我们表明可以应用相同的原理来在轻度掺杂的半导体中自发折断的对称性形成非平衡相关状态。周期性驱动器提供了获得损坏对称阶段所需状态的大电子密度的手段。由于相干外部驱动器,电子 - 电子相互作用以及由耦合到声子和电磁环境引起的耗散过程,相互作用是在系统的稳态中发生的。我们使用数值计算获得了系统的相图,这些计算匹配了从现象学处理中获得的预测,并讨论了系统上自发对称性破坏的系统和外部驱动器的条件。我们的结果表明,状态密度的Floquet工程为产生和控制电子与外部磁场的相关状态提供了新的途径。

"Floquet engineering" - designing band structures "on-demand" through the application of coherent time-periodic drives - has recently emerged as a powerful tool for creating new topological and anomalous phases of matter. In this manuscript, we show that the same principle can be applied to create non-equilibrium correlated states with spontaneously broken symmetry in a lightly doped semiconductor. The periodic drive provides means for obtaining large electronic densities of states necessary for the broken symmetry phase. The phase transition occurs in the steady-state of the system achieved due to interplay between the coherent external drive, electron-electron interactions, and dissipative processes arising from the coupling to phonons and the electromagnetic environment. We obtain the phase diagram of the system using numerical calculations that match predictions obtained from a phenomenological treatment and discuss the conditions on the system and the external drive under which spontaneous symmetry breaking occurs. Our results imply that Floquet engineering of the density of states provides a new route for generating and controlling correlated states of electrons with external fields.

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