标题： 黑磷在双圆偏振光照射下的旋磁效应 显示英文标题

标题： Gyrotropic Magnetic Effect in Black Phosphorus Irradiated with Bicircular Light

摘要： 螺旋磁效应，在缓慢变化的磁场下表现为螺旋推进电流，是费米面上布洛赫电子的基本性质；然而，它在实验中尚未被观察到。 在这里，我们理论提出，利用双圆偏振光（BCL）进行弗洛凯工程，即两个相反手性圆偏振光波的叠加，具有整数频率比，是一种生成和操控节点线半金属中螺旋磁效应的迷人策略。 通过调节BCL照射的空间对称性，可以诱导从节点线半金属相到由最少不对齐的外尔节点特征的外尔半金属相的拓扑转变，在施加缓慢振荡磁场时产生螺旋推进电流。 此外，使用第一性原理计算，我们表明在BCL照射下的压缩黑磷是一个实现具有巨大优势的大螺旋推进电流的理想候选材料。 我们的工作不仅拓宽了实现实验可访问的螺旋推进电流的潜在候选材料，还为拓扑现象与对称性光调控之间的相互作用提供了更深入的见解。 显示英文摘要

摘要： The gyrotropic magnetic effect, manifesting as a gyropropic current under a slowly-varying magnetic field, represents a fundamental property of Bloch electrons on the Fermi surface; however, it has not been observed in experiments. Here, we theoretically propose that Floquet engineering with bicircular light (BCL), which is a superposition of two opposite chiral waves of circularly polarized light with an integer frequency ratio, presents a fascinating strategy to generate and manipulate the gyrotropic magnetic effect in nodal line semimetals. The tailoring spatial symmetry of BCL irradiation can induce a topological transition from a nodal line semimetallic phase to a Weyl semimetallic phase characterized by a minimum number of misaligned Weyl nodes, resulting in the generation of gyrotropic current when a slowly oscillating magnetic field is applied. Moreover, using first-principles calculations, we show that the compressed black phosphorus under irradiation of BCL is an ideal candidate to realize the large gyropropic current with great advantages. Our work not only broadens potential candidate materials for achieving the experimentally accessible gyropropic current, but also provides deeper insights into the interplay between topological phenomena and light manipulation of symmetries.