Journal
NANO LETTERS
Volume 18, Issue 6, Pages 3844-3849Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.8b01125
Keywords
Giant magneto band structure; CrI3; two-dimensional materials; ferromagnetism
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Funding
- National Key RAMP
- D Program of China [2017YFA0303602]
- 3315 Program of Ningbo
- National Nature Science Foundation of China [11774360]
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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 th e 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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