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arXiv · 2501.13636

Topological semimetal with coexisting nodal points and nodal lines

Bing-Bing Luo·Ming-Jian Gao·Jun-Hong An
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Abstract

Featuring exotic quantum transport and surface states, topological semimetals can be classified into nodal-point, nodal-line, and nodal-surface semimetals according to the degeneracy and dimensionality of their nodes. However, a topological semimetal that possesses both nodal points and nodal lines is rarely reported. Here, we propose a scheme to construct this type of topological semimetal, which simultaneously exhibits hinge Fermi arcs and drumhead surface states. Then, by applying periodic driving on the system, we find a hybrid-order topological semimetal with nodal points and rich nodal-line structures and its conversion into a first-order topological semimetal, which are absent in a static system. Our results enrich the family of topological semimetals, and establish a foundation for further exploration of their potential applications.

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Bing-Bing Luo, Ming-Jian Gao, Jun-Hong An. 2025-01-23. Topological semimetal with coexisting nodal points and nodal lines. https://doi.org/10.1103/1qkj-63m8

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