Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2
The hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce. Here, through the first-principles calculations, we identify the monolayer Pb(ClO _2 ) _2...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2022-01-01
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| Series: | New Journal of Physics |
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| Online Access: | https://doi.org/10.1088/1367-2630/aca429 |
| _version_ | 1797748792482594816 |
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| author | Xin-Yue Kang Chunmei Zhang Mingxing Chen Si Li |
| author_facet | Xin-Yue Kang Chunmei Zhang Mingxing Chen Si Li |
| author_sort | Xin-Yue Kang |
| collection | DOAJ |
| description | The hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce. Here, through the first-principles calculations, we identify the monolayer Pb(ClO _2 ) _2 and Sr(ClO _2 ) _2 materials as the new realistic materials platform to realize 2D hourglass Weyl nodal loop. We show that these monolayer materials possess an hourglass Weyl nodal loop circling around the Γ point and Weyl nodal line on the Brillouin zone (BZ) boundary in the absence of spin–orbit coupling (SOC). Through the symmetry analysis, we demonstrate that the hourglass Weyl nodal loop and Weyl nodal line are protected by the nonsymmorphic symmetries, and are robust under the biaxial strains. When we include the SOC, a tiny gap will be opened in the hourglass nodal loop and nodal line, and the nodal line can be transformed into the spin-orbit Dirac points. Our results provide a new realistic material platform for studying the intriguing physics associated with the 2D hourglass Weyl nodal loop and spin-orbit Dirac points. |
| first_indexed | 2024-03-12T16:10:52Z |
| format | Article |
| id | doaj.art-cfff26f158384412958425b1718e91f0 |
| institution | Directory Open Access Journal |
| issn | 1367-2630 |
| language | English |
| last_indexed | 2024-03-12T16:10:52Z |
| publishDate | 2022-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | New Journal of Physics |
| spelling | doaj.art-cfff26f158384412958425b1718e91f02023-08-09T14:09:56ZengIOP PublishingNew Journal of Physics1367-26302022-01-01241111304410.1088/1367-2630/aca429Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2Xin-Yue Kang0Chunmei Zhang1Mingxing Chen2Si Li3School of Physics, Northwest University , Xi’an 710127, People’s Republic of China; Shaanxi Key Laboratory for Theoretical Physics Frontiers , Xi’an 710127, People’s Republic of ChinaSchool of Physics, Northwest University , Xi’an 710127, People’s Republic of ChinaSchool of Physics and Electronics, Hunan Normal University, Key Laboratory for Matter Microstructure and Function of Hunan Province , Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education,Changsha 410081, People’s Republic of ChinaSchool of Physics, Northwest University , Xi’an 710127, People’s Republic of China; Shaanxi Key Laboratory for Theoretical Physics Frontiers , Xi’an 710127, People’s Republic of ChinaThe hourglass fermions in solid-state materials have been attracting significant interest recently. However, realistic two-dimensional (2D) materials with hourglass-shaped band structures are still very scarce. Here, through the first-principles calculations, we identify the monolayer Pb(ClO _2 ) _2 and Sr(ClO _2 ) _2 materials as the new realistic materials platform to realize 2D hourglass Weyl nodal loop. We show that these monolayer materials possess an hourglass Weyl nodal loop circling around the Γ point and Weyl nodal line on the Brillouin zone (BZ) boundary in the absence of spin–orbit coupling (SOC). Through the symmetry analysis, we demonstrate that the hourglass Weyl nodal loop and Weyl nodal line are protected by the nonsymmorphic symmetries, and are robust under the biaxial strains. When we include the SOC, a tiny gap will be opened in the hourglass nodal loop and nodal line, and the nodal line can be transformed into the spin-orbit Dirac points. Our results provide a new realistic material platform for studying the intriguing physics associated with the 2D hourglass Weyl nodal loop and spin-orbit Dirac points.https://doi.org/10.1088/1367-2630/aca429topological quasiparticlehourglass fermionnodal line semimetaltwo-dimensional (2D) material |
| spellingShingle | Xin-Yue Kang Chunmei Zhang Mingxing Chen Si Li Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 New Journal of Physics topological quasiparticle hourglass fermion nodal line semimetal two-dimensional (2D) material |
| title | Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 |
| title_full | Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 |
| title_fullStr | Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 |
| title_full_unstemmed | Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 |
| title_short | Two-dimensional hourglass Weyl nodal loop in monolayer Pb(ClO2)2 and Sr(ClO2)2 |
| title_sort | two dimensional hourglass weyl nodal loop in monolayer pb clo2 2 and sr clo2 2 |
| topic | topological quasiparticle hourglass fermion nodal line semimetal two-dimensional (2D) material |
| url | https://doi.org/10.1088/1367-2630/aca429 |
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