论文标题
激光泵送电子系统中抑制，复兴和充电顺序损失的非平衡动力学
Nonequilibrium dynamics of suppression, revival, and loss of charge order in a laser pumped electron-phonon system
论文作者
论文摘要
相应填充的电子波系统通常以基态显示充电顺序（CO）。这样的系统受激光脉冲显示出多种行为。弱脉冲在顺序参数中设置了低振幅振荡，缓慢衰减至略有抑制的值。强脉冲会导致电荷顺序的破坏，而顺序参数显示快速，振荡，衰减至零。将弱脉冲CO的持续状态与强脉冲CO破坏状态分开的状态之间的状态，显示出复杂的动力学，其特征是脉冲强度依赖性，时间尺度。它涉及订单参数的初始快速衰减，然后是低振幅静止状态，并且在时间尺度上$τ_{Cr} $上升到稳态。我们提供了这个非平衡问题中动力学的完整表征，用于改变电子偶联和脉冲强度，检查长时间状态的有效“热”描述的可能性，并在出现的多个绝缘子金属过渡上产生结果。
An electron-phonon system at commensurate filling often displays charge order (CO) in the ground state. Such a system subject to a laser pulse shows a wide variety of behaviour. A weak pulse sets up low amplitude oscillations in the order parameter, with slow decay to a slightly suppressed value. A strong pulse leads to the destruction of the charge order with the order parameter showing rapid, oscillatory, decay to zero. The regime in between, separating the weak pulse CO sustained state from the strong pulse CO destroyed state, shows complex dynamics characterised by multiple, pulse strength dependent, time scales. It involves an initial rapid decay of the order parameter, followed by a low amplitude quiescent state, and the power-law rise to a steady-state over a timescale $τ_{cr}$. We provide a complete characterisation of the dynamics in this nonequilibrium problem for varying electron-phonon coupling and pulse strength, examine the possibility of an effective "thermal" description of the long time state, and present results on the multiple insulator-metal transitions that show up.
