Evidence of Temperature-Dependent Interplay between Spin and Orbital Moment in van der Waals Ferromagnet VI3

Alessandro De Vita, Roberto Sant, Vincent Polewczyk, Gerrit van der Laan, Nicholas B. Brookes, Tai Kong, Robert J. Cava, Giorgio Rossi, Giovanni Vinai, Giancarlo Panaccione

Research output: Contribution to journalArticlepeer-review

Abstract

van der Waals materials provide a versatile toolbox for the emergence of new quantum phenomena and fabrication of functional heterostructures. Among them, the trihalide VI3 stands out for its unique magnetic and structural landscape. Here we investigate the spin and orbital magnetic degrees of freedom in the layered ferromagnet VI3 by means of temperature-dependent X-ray absorption spectroscopy and X-ray magnetic circular and linear dichroism. We detect localized electronic states and reduced magnetic dimensionality, due to electronic correlations. We furthermore provide experimental evidence of (a) an unquenched orbital magnetic moment (up to 0.66(7) μB/V atom) in the ferromagnetic state and (b) an instability of the orbital moment in the proximity of the spin reorientation transition. Our results support a coherent picture where electronic correlations give rise to a strong magnetic anisotropy and a large orbital moment and establish VI3 as a prime candidate for the study of orbital quantum effects.

Original languageEnglish (US)
Pages (from-to)1487-1493
Number of pages7
JournalNano Letters
Volume24
Issue number5
DOIs
StatePublished - Feb 7 2024

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

Keywords

  • magnetism
  • quantum materials
  • van der Waals systems
  • X-ray absorption spectroscopy

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