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 language | English |
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Pages (from-to) | 3844-3849 |
Number of pages | 6 |
Journal | Nano letters |
Volume | 18 |
Issue number | 6 |
DOIs | |
Publication status | Published - 22 May 2018 |
Keywords
- UT-Hybrid-D
- ferromagnetism
- Giant magneto band structure
- two-dimensional materials
- CrI
- CrI3