Photoinduced Floquet higher-order Weyl semimetal in C_(6) symmetric Dirac semimetals  

作　　者：许欣欣 王梓名 许东辉 陈垂针 Xin-Xin Xu;Zi-Ming Wang;Dong-Hui Xu;Chui-Zhen Chen(Institute for Advanced Study and School of Physical Science and Technology,Soochow University,Suzhou 215006,China;Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 400044,China;Center of Quantum Materials and Devices,Chongqing University,Chongqing 400044,China)

机构地区：[1]Institute for Advanced Study and School of Physical Science and Technology,Soochow University,Suzhou 215006,China [2]Department of Physics and Chongqing Key Laboratory for Strongly Coupled Physics,Chongqing University,Chongqing 400044,China [3]Center of Quantum Materials and Devices,Chongqing University,Chongqing 400044,China

出　　处：《Chinese Physics B》2024年第6期109-117,共9页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant No. 2022YFA1403700);the National Natural Science Foundation of China (Grant Nos. 12074108 and 12347101);the Chongqing Natural Science Foundation (Grant No. CSTB2022NSCQ-MSX0568);the Fundamental Research Funds for the Central Universities (Grant No. 2023CDJXY048);the Natural Science Foundation of Jiangsu Province(Grant No. BK20230066);the Jiangsu Shuang Chuang Project (Grant No. JSSCTD202209)。

摘　　要：Topological Dirac semimetals are a parent state from which other exotic topological phases of matter, such as Weyl semimetals and topological insulators, can emerge. In this study, we investigate a Dirac semimetal possessing sixfold rotational symmetry and hosting higher-order topological hinge Fermi arc states, which is irradiated by circularly polarized light. Our findings reveal that circularly polarized light splits each Dirac node into a pair of Weyl nodes due to the breaking of time-reversal symmetry, resulting in the realization of the Weyl semimetal phase. This Weyl semimetal phase exhibits rich boundary states, including two-dimensional surface Fermi arc states and hinge Fermi arc states confined to six hinges.Furthermore, by adjusting the incident direction of the circularly polarized light, we can control the degree of tilt of the resulting Weyl cones, enabling the realization of different types of Weyl semimetals.

关 键 词：Dirac semimetals Weyl semimetals periodic driving higher-order topology 

分 类 号：O469[理学—凝聚态物理]