Spin direction controlled electronic band structure in two dimensional ferromagnetic CrI3

Peiheng Jiang, Lei Li, Zhaoliang Liao (Corresponding Author), Y.X. Zhao, Zhicheng Zhong (Corresponding Author)

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Abstract

Manipulating physical properties using the spin degree of freedom constitutes a major part of modern condensed matter physics and is a key aspect for spintronics devices. Using the newly discovered two dimensional van der Waals ferromagnetic CrI3 as a prototype material, we theoretically demonstrated a giant magneto band-structure (GMB) effect whereby a change of magnetization direction significantly modifies the electronic band structure. Our density functional theory calculations and model analysis reveal that rotating the magnetic moment of CrI3 from out-of-plane to in-plane causes a direct-to-indirect bandgap transition, inducing a magnetic field controlled photoluminescence. Moreover, our results show a significant change of Fermi surface with different magnetization directions, giving rise to giant anisotropic magnetoresistance. Additionally, the spin reorientation is found to modify the topological states. Given that a variety of properties are determined by band structures, our predicted GMB effect in CrI3 opens a new paradigm for spintronics applications.

Original languageEnglish
Pages (from-to)3844-3849
Number of pages6
JournalNano letters
Volume18
Issue number6
DOIs
Publication statusPublished - 22 May 2018

Keywords

  • UT-Hybrid-D
  • ferromagnetism
  • Giant magneto band structure
  • two-dimensional materials
  • CrI
  • CrI3

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