The discovery of three-dimensional Van Hove singularity
Abstract Arising from the extreme/saddle point in electronic bands, Van Hove singularity (VHS) manifests divergent density of states (DOS) and induces various new states of matter such as unconventional superconductivity. VHS is believed to exist in one and two dimensions, but rarely found in three...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-03-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-024-46626-9 |
| _version_ | 1797259197334683648 |
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| author | Wenbin Wu Zeping Shi Mykhaylo Ozerov Yuhan Du Yuxiang Wang Xiao-Sheng Ni Xianghao Meng Xiangyu Jiang Guangyi Wang Congming Hao Xinyi Wang Pengcheng Zhang Chunhui Pan Haifeng Pan Zhenrong Sun Run Yang Yang Xu Yusheng Hou Zhongbo Yan Cheng Zhang Hai-Zhou Lu Junhao Chu Xiang Yuan |
| author_facet | Wenbin Wu Zeping Shi Mykhaylo Ozerov Yuhan Du Yuxiang Wang Xiao-Sheng Ni Xianghao Meng Xiangyu Jiang Guangyi Wang Congming Hao Xinyi Wang Pengcheng Zhang Chunhui Pan Haifeng Pan Zhenrong Sun Run Yang Yang Xu Yusheng Hou Zhongbo Yan Cheng Zhang Hai-Zhou Lu Junhao Chu Xiang Yuan |
| author_sort | Wenbin Wu |
| collection | DOAJ |
| description | Abstract Arising from the extreme/saddle point in electronic bands, Van Hove singularity (VHS) manifests divergent density of states (DOS) and induces various new states of matter such as unconventional superconductivity. VHS is believed to exist in one and two dimensions, but rarely found in three dimension (3D). Here, we report the discovery of 3D VHS in a topological magnet EuCd2As2 by magneto-infrared spectroscopy. External magnetic fields effectively control the exchange interaction in EuCd2As2, and shift 3D Weyl bands continuously, leading to the modification of Fermi velocity and energy dispersion. Above the critical field, the 3D VHS forms and is evidenced by the abrupt emergence of inter-band transitions, which can be quantitatively described by the minimal model of Weyl semimetals. Three additional optical transitions are further predicted theoretically and verified in magneto-near-infrared spectra. Our results pave the way to exploring VHS in 3D systems and uncovering the coordination between electronic correlation and the topological phase. |
| first_indexed | 2024-04-24T23:05:36Z |
| format | Article |
| id | doaj.art-1d3a73625ece42bf93935cd3a2bd8536 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-04-24T23:05:36Z |
| publishDate | 2024-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-1d3a73625ece42bf93935cd3a2bd85362024-03-17T12:30:21ZengNature PortfolioNature Communications2041-17232024-03-0115111110.1038/s41467-024-46626-9The discovery of three-dimensional Van Hove singularityWenbin Wu0Zeping Shi1Mykhaylo Ozerov2Yuhan Du3Yuxiang Wang4Xiao-Sheng Ni5Xianghao Meng6Xiangyu Jiang7Guangyi Wang8Congming Hao9Xinyi Wang10Pengcheng Zhang11Chunhui Pan12Haifeng Pan13Zhenrong Sun14Run Yang15Yang Xu16Yusheng Hou17Zhongbo Yan18Cheng Zhang19Hai-Zhou Lu20Junhao Chu21Xiang Yuan22State Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityNational High Magnetic Field Laboratory, Florida State UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing, Fudan UniversityGuangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityMultifunctional Platform for Innovation Precision Machining Center, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityKey Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast UniversityKey Laboratory of Polar Materials and Devices, Ministry of Education, School of Physics and Electronic Science, East China Normal UniversityGuangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen UniversityGuangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-Sen UniversityState Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing, Fudan UniversityShenzhen Institute for Quantum Science and Engineering and Department of Physics, Southern University of Science and Technology (SUSTech)Key Laboratory of Polar Materials and Devices, Ministry of Education, School of Physics and Electronic Science, East China Normal UniversityState Key Laboratory of Precision Spectroscopy, East China Normal UniversityAbstract Arising from the extreme/saddle point in electronic bands, Van Hove singularity (VHS) manifests divergent density of states (DOS) and induces various new states of matter such as unconventional superconductivity. VHS is believed to exist in one and two dimensions, but rarely found in three dimension (3D). Here, we report the discovery of 3D VHS in a topological magnet EuCd2As2 by magneto-infrared spectroscopy. External magnetic fields effectively control the exchange interaction in EuCd2As2, and shift 3D Weyl bands continuously, leading to the modification of Fermi velocity and energy dispersion. Above the critical field, the 3D VHS forms and is evidenced by the abrupt emergence of inter-band transitions, which can be quantitatively described by the minimal model of Weyl semimetals. Three additional optical transitions are further predicted theoretically and verified in magneto-near-infrared spectra. Our results pave the way to exploring VHS in 3D systems and uncovering the coordination between electronic correlation and the topological phase.https://doi.org/10.1038/s41467-024-46626-9 |
| spellingShingle | Wenbin Wu Zeping Shi Mykhaylo Ozerov Yuhan Du Yuxiang Wang Xiao-Sheng Ni Xianghao Meng Xiangyu Jiang Guangyi Wang Congming Hao Xinyi Wang Pengcheng Zhang Chunhui Pan Haifeng Pan Zhenrong Sun Run Yang Yang Xu Yusheng Hou Zhongbo Yan Cheng Zhang Hai-Zhou Lu Junhao Chu Xiang Yuan The discovery of three-dimensional Van Hove singularity Nature Communications |
| title | The discovery of three-dimensional Van Hove singularity |
| title_full | The discovery of three-dimensional Van Hove singularity |
| title_fullStr | The discovery of three-dimensional Van Hove singularity |
| title_full_unstemmed | The discovery of three-dimensional Van Hove singularity |
| title_short | The discovery of three-dimensional Van Hove singularity |
| title_sort | discovery of three dimensional van hove singularity |
| url | https://doi.org/10.1038/s41467-024-46626-9 |
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