Photoinduced Floquet higher-order Weyl semimetal in C6 symmetric Dirac semimetals

doi:10.1088/1674-1056/ad4634

中国物理B ›› 2024, Vol. 33 ›› Issue (6): 67801-067801.doi: 10.1088/1674-1056/ad4634

Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals

Xin-Xin Xu(许欣欣)¹, Zi-Ming Wang(王梓名)², Dong-Hui Xu(许东辉)^2,3,†, and Chui-Zhen Chen(陈垂针)^1,‡

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

收稿日期:2024-04-03 修回日期:2024-04-29 接受日期:2024-05-02 出版日期:2024-06-18 发布日期:2024-06-18
通讯作者: Dong-Hui Xu, Chui-Zhen Chen E-mail:donghuixu@cqu.edu.cn;czchen@suda.edu.cn
基金资助:
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), and the Jiangsu Shuang Chuang Project (Grant No. JSSCTD202209).

Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals

Xin-Xin Xu(许欣欣)¹, Zi-Ming Wang(王梓名)², Dong-Hui Xu(许东辉)^2,3,†, and Chui-Zhen Chen(陈垂针)^1,‡

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

Received:2024-04-03 Revised:2024-04-29 Accepted:2024-05-02 Online:2024-06-18 Published:2024-06-18
Contact: Dong-Hui Xu, Chui-Zhen Chen E-mail:donghuixu@cqu.edu.cn;czchen@suda.edu.cn
Supported by:
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), and the Jiangsu Shuang Chuang Project (Grant No. JSSCTD202209).

摘要/Abstract

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

Abstract: 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.

Key words: Dirac semimetals, Weyl semimetals, periodic driving, higher-order topology

中图分类号: (Metals, semimetals, and alloys)

78.40.Kc

03.65.Vf (Phases: geometric; dynamic or topological)

Xin-Xin Xu(许欣欣), Zi-Ming Wang(王梓名), Dong-Hui Xu(许东辉), and Chui-Zhen Chen(陈垂针). Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals[J]. 中国物理B, 2024, 33(6): 67801-067801.

Xin-Xin Xu(许欣欣), Zi-Ming Wang(王梓名), Dong-Hui Xu(许东辉), and Chui-Zhen Chen(陈垂针). Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals[J]. Chin. Phys. B, 2024, 33(6): 67801-067801.

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Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals

Photoinduced Floquet higher-order Weyl semimetal in C₆ symmetric Dirac semimetals

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