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Electronic Structure of Above-Room-Temperature van der Waals Ferromagnet Fe3GaTe2.
Lee, Ji-Eun; Yan, Shaohua; Oh, Sehoon; Hwang, Jinwoong; Denlinger, Jonathan D; Hwang, Choongyu; Lei, Hechang; Mo, Sung-Kwan; Park, Se Young; Ryu, Hyejin.
Affiliation
  • Lee JE; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
  • Yan S; Max Planck POSTECH Center for Complex Phase Materials, Pohang University of Science and Technology, Pohang 37673, Korea.
  • Oh S; Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices, Department of Physics, Renmin University of China, Beijing 100872, China.
  • Hwang J; Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China, Beijing 100872, China.
  • Denlinger JD; Department of Physics and Origin of Matter and Evolution of Galaxies (OMEG) Institute, Soongsil University, Seoul 06978, Korea.
  • Hwang C; Department of Physics, Kangwon National University, Chuncheon 24341, Korea.
  • Lei H; Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
  • Mo SK; Department of Physics, Pusan National University, Busan 46241, Korea.
  • Park SY; Quantum Matter Core Facility, Pusan National University, Busan 46241, Korea.
  • Ryu H; Beijing Key Laboratory of Optoelectronic Functional Materials MicroNano Devices, Department of Physics, Renmin University of China, Beijing 100872, China.
Nano Lett ; 23(24): 11526-11532, 2023 Dec 27.
Article in En | MEDLINE | ID: mdl-38079244
Fe3GaTe2, a recently discovered van der Waals ferromagnet, demonstrates intrinsic ferromagnetism above room temperature, necessitating a comprehensive investigation of the microscopic origins of its high Curie temperature (TC). In this study, we reveal the electronic structure of Fe3GaTe2 in its ferromagnetic ground state using angle-resolved photoemission spectroscopy and density functional theory calculations. Our results establish a consistent correspondence between the measured band structure and theoretical calculations, underscoring the significant contributions of the Heisenberg exchange interaction (Jex) and magnetic anisotropy energy to the development of the high-TC ferromagnetic ordering in Fe3GaTe2. Intriguingly, we observe substantial modifications to these crucial driving factors through doping, which we attribute to alterations in multiple spin-splitting bands near the Fermi level. These findings provide valuable insights into the underlying electronic structure and its correlation with the emergence of high-TC ferromagnetic ordering in Fe3GaTe2.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nano Lett Year: 2023 Document type: Article Affiliation country: United States Country of publication: United States

Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Nano Lett Year: 2023 Document type: Article Affiliation country: United States Country of publication: United States