Abstract

With remarkable progress achieved in classifying and characterizing quantum states of matter (including band topology, flat bands, topological superconductivity, topological phonons, and magnetism), the central emphasis of condensed matter physics has transitioned toward quantum control—specifically the generation and precise manipulation of quantum states of matter. Floquet engineering, which involves system modification through periodic field modulation, emerges as a effective methodology for controlling system properties, even enabling the emergence of exotic non-equilibrium phenomena unobtainable in equilibrium conditions. This presentation will showcase our series of theoretical studies on Floquet-engineered band topology, topological superconductivity, and magnetic phenomena, spanning from effective models to realistic material systems. We demonstrate that photoexcitation can facilitate diverse target states via symmetry breaking mechanisms, including but not limited to: tunable Weyl semimetals, Floquet chiral topological superconductors, and conventional collinear antiferromagnets exhibiting odd-parity spin splitting.

主讲人简介

马大帅，重庆大学物理学院副教授，硕士生导师。2015年于北京理工大学获理学学士学位，2021年于北京理工大学获理学博士学位。2019年-2020年于普林斯顿大学联合培养。2022年3月入职重庆大学物理学院。主要从事计算凝聚态物理相关研究，包括：对称性保护的拓扑态、拓扑平带、材料设计与预测、拓扑电子/声子体系、拓扑量子态的调控、自旋/电子输运等。多项相关研究成果以第一作者或通讯作者在Nature, Physical Review Letters，Nano Letters，Physical Review B等期刊发表。作为项目负责人主持博士后创新人才支持计划，国自然青基等多项科研项目。