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.
基金项目
国家重点研发计划(2022YFA1403700)
国家自然科学基金(12074108)
国家自然科学基金(12347101)
重庆市自然科学基金(CSTB2022NSCQ-MSX0568)
中央高校基本科研业务费专项(2023CD-JXY048)
江苏省自然科学基金(BK20230066)
Jiangsu Shuang Chuang Project(JSSCTD202209)
NETL
NSTL
万方数据