Landau量子化石墨烯中对称性破缺的超碰撞
Symmetry-breaking supercollisions in Landau-quantized graphene
摘要：
最近在垂直磁场中对石墨烯进行的泵浦-探测实验已经揭示了载流子弛豫时间范围从皮秒到纳秒，这取决于样品的质量。为了解释这一令人惊讶的行为，我们提出了一种新的破环缺陷辅助弛豫通道。这使得电子能够与单个面外声子散射，这大大加速了低质量样品中的载流子散射时间。所获得的见解提供了一种策略，用于调整石墨烯和相关材料中的载流子弛豫时间的数量级。
英文摘要：
Recent pump-probe experiments performed on graphene in a perpendicular magnetic field have revealed carrier relaxation times ranging from picoseconds to nanoseconds depending on the quality of the sample. To explain this surprising behavior, we propose a novel symmetry-breaking defect-assisted relaxation channel. This enables scattering of electrons with single out-of-plane phonons, which drastically accelerate the carrier scattering time in low-quality samples. The gained insights provide a strategy for tuning the carrier relaxation time in graphene and related materials by orders of magnitude.
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。
