标题： 通过温度相关的能带重正化控制Bi$_2$Te$_3$中的区间散射 显示英文标题

标题： Control of intervalley scattering in Bi$_2$Te$_3$ via temperature-dependent band renormalization

摘要： 控制拓扑绝缘体中的非平衡电子动力学对于释放其在下一代量子技术中的潜力至关重要。 然而，温度对电子能带结构重正化以及由此产生的电子散射过程的影响仍然难以捉摸。 本文利用高分辨率时间和角度分辨光电子能谱 (TR-ARPES) 表明，即使 Bi$_2$Te$_3$ 导带发生轻微（约 15 meV）的重正化，也能对体相和表面电子散射过程产生关键性影响。 在动力学蒙特卡罗玩具模型的支持下，我们表明温度引起的体能带结构变化会调节谷间电子-声子散射速率，从而重塑非平衡响应。 这项研究确立了温度作为控制拓扑绝缘体散射路径的有效旋钮。 显示英文摘要

摘要： The control of out-of-equilibrium electron dynamics in topological insulators is essential to unlock their potential in next-generation quantum technologies. However, the role of temperature on the renormalization of the electronic band structure and, consequently, on electron scattering processes is still elusive. Here, using high-resolution time- and angle-resolved photoemission spectroscopy (TR-ARPES), we show that even a modest ($\sim$15 meV) renormalization of the conduction band of Bi$_2$Te$_3$ can critically affect bulk and surface electron scattering processes. Supported by a kinetic Monte Carlo toy-model, we show that temperature-induced changes in the bulk band structure modulate the intervalley electron-phonon scattering rate, reshaping the out-of-equilibrium response. This work establishes temperature as an effective control knob for engineering scattering pathways in topological insulators.