- Physical Review Journals
All JournalsPhysics Magazine

Physical Review Materials

Export citation

Export citation

Choose format for download:

Download Citation
  • Letter

Observation of Fermi arcs and Weyl nodes in a noncentrosymmetric magnetic Weyl semimetal

Anup Pradhan Sakhya1, Cheng-Yi Huang2, Gyanendra Dhakal1, Xue-Jian Gao3, Sabin Regmi1, Baokai Wang2, Wei Wen4, R.-H. He4, Xiaohan Yao5 et al.

Robert Smith1, Milo Sprague1, Shunye Gao6, Bahadur Singh7, Hsin Lin8, Su-Yang Xu9, Fazel Tafti5, Arun Bansil2, and Madhab Neupane1,*

  • 1Department of Physics, University of Central Florida, Orlando, Florida 32816, USA
  • 2Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA
  • 3Department of Physics, Hong Kong University of Science and Technology, Hong Kong, China
  • 4Key Laboratory for Quantum Materials of Zhejiang Province, Department of Physics, Westlake University, Hangzhou, Zhejiang 310024, China
  • 5Department of Physics, Boston College, Chestnut Hill, Massachusetts 02467, USA
  • 6Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  • 7Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Mumbai 400005, India
  • 8Institute of Physics, Academia Sinica, Taipei, Taiwan, Republic of China
  • 9Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA

  • *Corresponding author: madhab.neupane@ucf.edu
PDF

Phys. Rev. Materials 7, L051202 – Published 16 May, 2023

DOI: https://doi.org/10.1103/PhysRevMaterials.7.L051202

Abstract

Weyl semimetal (WSM), a novel state of quantum matter, hosts Weyl fermions as emergent quasiparticles resulting from the breaking of either inversion or time-reversal symmetry. Magnetic WSMs that arise from broken time-reversal symmetry provide an exceptional platform to understand the interplay between magnetic order and Weyl physics, but only a few WSMs have been realized. Here, we identify CeAlSi as a new noncentrosymmetric magnetic WSM via angle-resolved photoemission spectroscopy (ARPES) and first-principles, density-functional theory based calculations. Our surface-sensitive vacuum ultraviolet ARPES data confirm the presence of surface Fermi arcs as the conclusive evidence for the existence of the Weyl semimetallic state in CeAlSi. We also observe bulk Weyl cones at the Fermi arc terminations in CeAlSi using bulk-sensitive soft-x-ray ARPES measurements. These results implicate CeAlSi as a unique platform for investigating exotic quantum phenomena resulting from the interaction of topology and magnetism.

View figure in article

Physics Subject Headings (PhySH)

Authorization Required

We need you to provide your credentials before accessing this content.
Article Available via CHORUS
Download Accepted Manuscript

Other Options

Supplemental Material (Subscription Required)

References (Subscription Required)

Outline

Information

Phys. Rev. Materials 7, L051202– Published 16 May, 2023
  • Received 21 November 2022
  • Revised 26 March 2023
  • Accepted 19 April 2023
Crossmark - Check for updates button

©2023 American Physical Society

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation