Your browser doesn't support javascript.
loading
Observation of Type-II Topological Nodal-Line Fermions in ZrSiSe.
Zhao, Minhao; Zhuang, Zheng-Yang; Wu, Fan; Leng, Pengliang; Joseph, Nesta Benno; Xie, Xiaoyi; Ozerov, Mykhaylo; He, Shanmei; Chen, Yulin; Narayan, Awadhesh; Liu, Zhongkai; Xiu, Faxian.
Afiliação
  • Zhao M; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
  • Zhuang ZY; Shanghai Qi Zhi Institute,41st Floor, AI Tower, No. 701 Yunjin Road, Xuhui District, Shanghai 200232, China.
  • Wu F; School of Physics, Sun Yat-Sen University, Guangzhou 510275, China.
  • Leng P; School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.
  • Joseph NB; Lingang Laboratory, Shanghai 200031, China.
  • Xie X; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
  • Ozerov M; Shanghai Qi Zhi Institute,41st Floor, AI Tower, No. 701 Yunjin Road, Xuhui District, Shanghai 200232, China.
  • He S; Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India.
  • Chen Y; State Key Laboratory of Surface Physics and Department of Physics, Fudan University, Shanghai 200433, China.
  • Narayan A; Shanghai Qi Zhi Institute,41st Floor, AI Tower, No. 701 Yunjin Road, Xuhui District, Shanghai 200232, China.
  • Liu Z; National High Magnetic Field Laboratory, Florida State University, Tallahassee, Florida 32310, United States.
  • Xiu F; Department of Physics, Clarendon Laboratory, University of Oxford, Oxford OX1 3PU, U.K.
ACS Nano ; 18(26): 16684-16691, 2024 Jul 02.
Article em En | MEDLINE | ID: mdl-38885639
ABSTRACT
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.
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: ACS Nano Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China