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arXiv · 1805.05675

Spin direction controlled electronic band structure in two dimensional ferromagnetic CrI3

Peiheng Jiang·Lei Li·Zhaoliang Liao·Y. X. Zhao·Zhicheng Zhong
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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 very important for spintronics devices. Using the newly discovered two dimensional van der Waals ferromagnetic CrI3 as a prototypic 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.

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Peiheng Jiang, Lei Li, Zhaoliang Liao, Y. X. Zhao, Zhicheng Zhong. 2018-05-15. Spin direction controlled electronic band structure in two dimensional ferromagnetic CrI3. https://doi.org/10.1021/acs.nanolett.8b01125

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