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  • Letter
  • Open Access

Signature of topological band crossing in ferromagnetic Cr1/3NbSe2 epitaxial thin film

Bruno Kenichi Saika1, Satoshi Hamao1, Yuki Majima1, Xiang Huang1, Hideki Matsuoka2, Satoshi Yoshida1, Miho Kitamura3, Masato Sakano1,4, Tatsuto Hatanaka1 et al.

Takuya Nomoto5, Motoaki Hirayama1,2,4, Koji Horiba3, Hiroshi Kumigashira6, Ryotaro Arita5,2, Yoshihiro Iwasa1,2,4, Masaki Nakano1,2,4, and Kyoko Ishizaka1,2,4

  • 1Department of Applied Physics, University of Tokyo, Tokyo 113-8654, Japan
  • 2RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198, Japan
  • 3Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba 305-0801, Japan
  • 4Quantum-Phase Electronics Center (QPEC), The University of Tokyo, Wako 113-8656, Japan
  • 5Research Center for Advanced Science and Technology, University of Tokyo, Komaba Meguro-ku, Tokyo 153-8904, Japan
  • 6Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan

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Phys. Rev. Research 4, L042021 – Published 4 November, 2022

DOI: https://doi.org/10.1103/PhysRevResearch.4.L042021

Abstract

In intercalated transition metal dichalcogenides (I-TMDCs), transition metal intercalation introduces magnetic phases which in some cases induce topological band crossing. However, evidence of the topological properties remains elusive in such materials. Here, we employ angle-resolved photoemission spectroscopy to reveal the band structure of epitaxially grown ferromagnetic Cr1/3NbSe2. Experimental evidence of the Weyl crossing shows Cr1/3NbSe2 to be a topological ferromagnet. This Letter highlights I-TMDCs as a platform towards the interplay of magnetic and topological physics in low-dimensional systems.

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Phys. Rev. Research 4, L042021– Published 4 November, 2022
  • Received 30 April 2022
  • Accepted 3 October 2022
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

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