Anomalous Hall effect in 2H-phase MX2 transition-metal dichalcogenide monolayers on ferromagnetic substrates (M = Mo, W, and X = S, Se, Te)

Anomalous Hall effect in 2H-phase MX2 transition-metal dichalcogenide monolayers on ferromagnetic... We study the anomalous Hall effect in monolayers of transition-metal dichalcogenides 2H-MX2 (M = Mo, W, and X = S, Se, Te) under a proximity effect of ferromagnetic substrate. If a proximity-induced exchange field is introduced, the spin-polarized energy bands in K and K′ valleys are shifted in the opposite directions, and it causes the Hall effect by breaking time-reversal symmetry. The induced Hall effect is the most prominent in the valence band, which has a large intrinsic spin splitting. Moreover, we find that tilting the magnetization from the perpendicular direction gives rise to a sensitive change in the Hall conductivity only in the electron side, and it is attributed to the mixing of the Berry phase by the in-plane field in the nearly degenerate conduction bands. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Anomalous Hall effect in 2H-phase MX2 transition-metal dichalcogenide monolayers on ferromagnetic substrates (M = Mo, W, and X = S, Se, Te)

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Anomalous Hall effect in 2H-phase MX2 transition-metal dichalcogenide monolayers on ferromagnetic substrates (M = Mo, W, and X = S, Se, Te)

Abstract

We study the anomalous Hall effect in monolayers of transition-metal dichalcogenides 2H-MX2 (M = Mo, W, and X = S, Se, Te) under a proximity effect of ferromagnetic substrate. If a proximity-induced exchange field is introduced, the spin-polarized energy bands in K and K′ valleys are shifted in the opposite directions, and it causes the Hall effect by breaking time-reversal symmetry. The induced Hall effect is the most prominent in the valence band, which has a large intrinsic spin splitting. Moreover, we find that tilting the magnetization from the perpendicular direction gives rise to a sensitive change in the Hall conductivity only in the electron side, and it is attributed to the mixing of the Berry phase by the in-plane field in the nearly degenerate conduction bands.
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Publisher
American Physical Society (APS)
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.085411
Publisher site
See Article on Publisher Site

Abstract

We study the anomalous Hall effect in monolayers of transition-metal dichalcogenides 2H-MX2 (M = Mo, W, and X = S, Se, Te) under a proximity effect of ferromagnetic substrate. If a proximity-induced exchange field is introduced, the spin-polarized energy bands in K and K′ valleys are shifted in the opposite directions, and it causes the Hall effect by breaking time-reversal symmetry. The induced Hall effect is the most prominent in the valence band, which has a large intrinsic spin splitting. Moreover, we find that tilting the magnetization from the perpendicular direction gives rise to a sensitive change in the Hall conductivity only in the electron side, and it is attributed to the mixing of the Berry phase by the in-plane field in the nearly degenerate conduction bands.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Aug 7, 2017

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