Observation of type-II topological nodal-line fermions in ZrSiSe
Recently, there has been significant interest in topological nodal-line semimetals due to their linear energy dispersion with one-dimensional nodal lines or loops. These materials exhibit fascinating physical properties, such as drumhead surface states and 3D anisotropic nodal-line structures. Simil...
| Hlavní autoři: | , , , , , , , , , , , |
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| Médium: | Journal article |
| Jazyk: | English |
| Vydáno: |
American Chemical Society
2024
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| _version_ | 1826315174925041664 |
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| author | Zhao, M Zhuang, Z-Y Wu, F Leng, P Joseph, NB Xie, X Ozerov, M He, S Chen, Y Narayan, A Liu, Z Xiu, F |
| author_facet | Zhao, M Zhuang, Z-Y Wu, F Leng, P Joseph, NB Xie, X Ozerov, M He, S Chen, Y Narayan, A Liu, Z Xiu, F |
| author_sort | Zhao, M |
| collection | OXFORD |
| description | Recently, there has been significant interest in topological nodal-line semimetals due to their linear energy dispersion with one-dimensional nodal lines or loops. These materials exhibit fascinating physical properties, such as drumhead surface states and 3D anisotropic nodal-line structures. Similar to Weyl semimetals, type-II nodal-line semimetals have two crossing bands that are both electron-like or hole-like along a certain direction. However, the direct observation of type-II nodal-line Fermions has been challenging due to the lack of suitable material platforms and the low density of states. Here we present experimental evidence for the coexistence of both type-I and type-II nodal-line Fermions in ZrSiSe, which was obtained through magneto-optical and angle-resolved photoemission spectroscopy (ARPES) measurements. Our density functional theory calculations predict that the type-II nodal-line structure can be developed in the Z-R line of the first Brillouin zone based on the lattice constants of the grown single crystal. Indeed, ARPES measurements reveal the type-II nodal-line band structure. The extracted type-II Landau level transitions from magneto-optical measurements exhibit good agreement with the calculated type-II energy dispersion model based on the band structure. Our experimental results demonstrate that ZrSiSe possesses two types of nodal-line Fermions, distinguishing it from other ZrSiX (X = S, Te) materials and positioning it as an ideal platform for investigating type-II nodal-line semimetals. |
| first_indexed | 2024-12-09T03:20:49Z |
| format | Journal article |
| id | oxford-uuid:d89d9c20-a913-4f3c-afb6-ba6192ae0dd9 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-12-09T03:20:49Z |
| publishDate | 2024 |
| publisher | American Chemical Society |
| record_format | dspace |
| spelling | oxford-uuid:d89d9c20-a913-4f3c-afb6-ba6192ae0dd92024-11-07T15:03:33ZObservation of type-II topological nodal-line fermions in ZrSiSe Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d89d9c20-a913-4f3c-afb6-ba6192ae0dd9EnglishSymplectic ElementsAmerican Chemical Society2024Zhao, MZhuang, Z-YWu, FLeng, PJoseph, NBXie, XOzerov, MHe, SChen, YNarayan, ALiu, ZXiu, FRecently, there has been significant interest in topological nodal-line semimetals due to their linear energy dispersion with one-dimensional nodal lines or loops. These materials exhibit fascinating physical properties, such as drumhead surface states and 3D anisotropic nodal-line structures. Similar to Weyl semimetals, type-II nodal-line semimetals have two crossing bands that are both electron-like or hole-like along a certain direction. However, the direct observation of type-II nodal-line Fermions has been challenging due to the lack of suitable material platforms and the low density of states. Here we present experimental evidence for the coexistence of both type-I and type-II nodal-line Fermions in ZrSiSe, which was obtained through magneto-optical and angle-resolved photoemission spectroscopy (ARPES) measurements. Our density functional theory calculations predict that the type-II nodal-line structure can be developed in the Z-R line of the first Brillouin zone based on the lattice constants of the grown single crystal. Indeed, ARPES measurements reveal the type-II nodal-line band structure. The extracted type-II Landau level transitions from magneto-optical measurements exhibit good agreement with the calculated type-II energy dispersion model based on the band structure. Our experimental results demonstrate that ZrSiSe possesses two types of nodal-line Fermions, distinguishing it from other ZrSiX (X = S, Te) materials and positioning it as an ideal platform for investigating type-II nodal-line semimetals. |
| spellingShingle | Zhao, M Zhuang, Z-Y Wu, F Leng, P Joseph, NB Xie, X Ozerov, M He, S Chen, Y Narayan, A Liu, Z Xiu, F Observation of type-II topological nodal-line fermions in ZrSiSe |
| title | Observation of type-II topological nodal-line fermions in ZrSiSe
|
| title_full | Observation of type-II topological nodal-line fermions in ZrSiSe
|
| title_fullStr | Observation of type-II topological nodal-line fermions in ZrSiSe
|
| title_full_unstemmed | Observation of type-II topological nodal-line fermions in ZrSiSe
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| title_short | Observation of type-II topological nodal-line fermions in ZrSiSe
|
| title_sort | observation of type ii topological nodal line fermions in zrsise |
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