Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes
In most Weyl semimetal (WSMs), the Weyl nodes with opposite chiralities usually have the same type of band dispersions (either type-I or type-II), whereas realistic candidate materials hosting different types of Weyl nodes have not been identified to date. Here we report for the first time that, a t...
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Elsevier
2020-07-01
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| Series: | Journal of Advanced Research |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090123220301090 |
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| author | Weizhen Meng Xiaoming Zhang Tingli He Lei Jin Xuefang Dai Ying Liu Guodong Liu |
| author_facet | Weizhen Meng Xiaoming Zhang Tingli He Lei Jin Xuefang Dai Ying Liu Guodong Liu |
| author_sort | Weizhen Meng |
| collection | DOAJ |
| description | In most Weyl semimetal (WSMs), the Weyl nodes with opposite chiralities usually have the same type of band dispersions (either type-I or type-II), whereas realistic candidate materials hosting different types of Weyl nodes have not been identified to date. Here we report for the first time that, a ternary compound HfCuP, is an excellent WSM with the coexistence of type-I and type-II Weyl nodes. Our results show that, HfCuP totally contains six pairs of type-I and six pairs of type-II Weyl nodes in the Brillouin zone, all locating at the H-K path. These Weyl nodes situate slightly below the Fermi level, and do not coexist with other extraneous bands. The nontrivial band structure in HfCuP produces clear Fermi arc surface states in the (1 0 0) surface projection. Moreover, we find the Weyl nodes in HfCuP can be effectively tuned by strain engineering. These characteristics make HfCuP a potential candidate material to investigate the novel properties of type-I and type-II Weyl fermions, as well as the potential entanglements between them. |
| first_indexed | 2024-04-14T02:04:17Z |
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| id | doaj.art-0b52fa71e0aa4f8e8df9f03ab4b1e871 |
| institution | Directory Open Access Journal |
| issn | 2090-1232 |
| language | English |
| last_indexed | 2024-04-14T02:04:17Z |
| publishDate | 2020-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Advanced Research |
| spelling | doaj.art-0b52fa71e0aa4f8e8df9f03ab4b1e8712022-12-22T02:18:44ZengElsevierJournal of Advanced Research2090-12322020-07-0124523528Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodesWeizhen Meng0Xiaoming Zhang1Tingli He2Lei Jin3Xuefang Dai4Ying Liu5Guodong Liu6School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China; State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China; Corresponding author.School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China; State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology, Tianjin 300130, China; School of Physics and Electronic Engineering, Chongqing Normal University, Chongqing 400044, China; Corresponding author.In most Weyl semimetal (WSMs), the Weyl nodes with opposite chiralities usually have the same type of band dispersions (either type-I or type-II), whereas realistic candidate materials hosting different types of Weyl nodes have not been identified to date. Here we report for the first time that, a ternary compound HfCuP, is an excellent WSM with the coexistence of type-I and type-II Weyl nodes. Our results show that, HfCuP totally contains six pairs of type-I and six pairs of type-II Weyl nodes in the Brillouin zone, all locating at the H-K path. These Weyl nodes situate slightly below the Fermi level, and do not coexist with other extraneous bands. The nontrivial band structure in HfCuP produces clear Fermi arc surface states in the (1 0 0) surface projection. Moreover, we find the Weyl nodes in HfCuP can be effectively tuned by strain engineering. These characteristics make HfCuP a potential candidate material to investigate the novel properties of type-I and type-II Weyl fermions, as well as the potential entanglements between them.http://www.sciencedirect.com/science/article/pii/S2090123220301090Topological materialsWeyl semimetalsFermi arcFirst principles |
| spellingShingle | Weizhen Meng Xiaoming Zhang Tingli He Lei Jin Xuefang Dai Ying Liu Guodong Liu Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes Journal of Advanced Research Topological materials Weyl semimetals Fermi arc First principles |
| title | Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes |
| title_full | Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes |
| title_fullStr | Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes |
| title_full_unstemmed | Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes |
| title_short | Ternary compound HfCuP: An excellent Weyl semimetal with the coexistence of type-I and type-II Weyl nodes |
| title_sort | ternary compound hfcup an excellent weyl semimetal with the coexistence of type i and type ii weyl nodes |
| topic | Topological materials Weyl semimetals Fermi arc First principles |
| url | http://www.sciencedirect.com/science/article/pii/S2090123220301090 |
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