The discovery of three-dimensional Van Hove singularity

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 and Xiang Yuan ()
Additional contact information
Wenbin Wu: East China Normal University
Zeping Shi: East China Normal University
Mykhaylo Ozerov: Florida State University
Yuhan Du: East China Normal University
Yuxiang Wang: Fudan University
Xiao-Sheng Ni: Sun Yat-Sen University
Xianghao Meng: East China Normal University
Xiangyu Jiang: East China Normal University
Guangyi Wang: East China Normal University
Congming Hao: East China Normal University
Xinyi Wang: East China Normal University
Pengcheng Zhang: East China Normal University
Chunhui Pan: East China Normal University
Haifeng Pan: East China Normal University
Zhenrong Sun: East China Normal University
Run Yang: Southeast University
Yang Xu: East China Normal University
Yusheng Hou: Sun Yat-Sen University
Zhongbo Yan: Sun Yat-Sen University
Cheng Zhang: Fudan University
Hai-Zhou Lu: Southern University of Science and Technology (SUSTech)
Junhao Chu: East China Normal University
Xiang Yuan: East China Normal University

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: 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.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-024-46626-9 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46626-9

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-46626-9

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().