NDLI: The Magnetic Proximity Effect Induced Large Valley Splitting in 2D $InSe/FeI

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The Magnetic Proximity Effect Induced Large Valley Splitting in 2D $InSe/FeI_{2}$ Heterostructures

Content Provider	MDPI
Author	Lin, Yifeng Zhang, Changcheng Guan, Lixiu Sun, Zhipeng Tao, Junguang
Copyright Year	2020
Description	The manipulation of valley splitting has potential applications in valleytronics, which lacks in pristine two-dimensional (2D) InSe. Here, we demonstrate that valley physics in InSe can be activated via the magnetic proximity effect exerted by ferromagnetic $FeI_{2}$ substrate with spin-orbit coupling. The valley splitting energy can reach 48 meV, corresponding to a magnetic exchange field of ~800 T. The system also presents magnetic anisotropy behavior with its easy magnetization axis tunable from in-plane to out-of-plane by the stacking configurations and biaxial tensile strain. The d-orbital-resolved magnetic anisotropic energy contributions indicate that the tensile strain effect arises from the increase of hybridization between minority Fe $d_{xy}$ and $dx2-y2$ states. Our results reveal that the magnetic proximity effect is an effective approach to stimulate the valley properties in InSe to extend its spintronic applications, which is expected to be feasible in other group-III monochalcogenides.
Starting Page	1642
e-ISSN	20794991
DOI	10.3390/nano10091642
Journal	Nanomaterials
Issue Number	9
Volume Number	10
Language	English
Publisher	MDPI
Publisher Date	2020-08-21
Access Restriction	Open
Subject Keyword	Nanomaterials Inorganic Chemistry Inse Magnetic Proximity Effect First-principles Calculations Spin-orbit Coupling
Content Type	Text
Resource Type	Article

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