Valley spin-acoustic resonance in MoS2 monolayers

K. Sonowal; D. V. Boev; A. V. Kalameitsev; V. M. Kovalev; I. G. Savenko

doi:10.1103/PhysRevB.106.155426

Valley spin-acoustic resonance in MoS2 monolayers

K. Sonowal, D. V. Boev, A. V. Kalameitsev, V. M. Kovalev^*, I. G. Savenko

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The band structure of a monolayer MoS2 comprises spin-split subbands, owing to the mutual presence of broken inversion symmetry and strong spin-orbit coupling. In the conduction band, spin-valley coupled subbands cross each other at finite momenta, and they are valley degenerate. When exposed to surface acoustic waves, the emerging strain-induced effective magnetic fields can give rise to spin-flip transitions between the spin-split subbands in the vicinity of the subband crossing point, resulting in the emergence of a spin-acoustic resonance and the acoustoelectric current. Resonance peaks occur at acoustic frequencies of gigahertz range in the vicinity of the subband crossing point. An external magnetic field breaks the valley degeneracy, resulting in the valley-selective splitting of spin-acoustic resonances, both in surface acoustic wave absorption and acoustoelectric current.

Original language	English
Article number	155426
Journal	Physical Review B
Volume	106
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.106.155426
State	Published - 15 Oct 2022
Externally published	Yes

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title = "Valley spin-acoustic resonance in MoS2 monolayers",

abstract = "The band structure of a monolayer MoS2 comprises spin-split subbands, owing to the mutual presence of broken inversion symmetry and strong spin-orbit coupling. In the conduction band, spin-valley coupled subbands cross each other at finite momenta, and they are valley degenerate. When exposed to surface acoustic waves, the emerging strain-induced effective magnetic fields can give rise to spin-flip transitions between the spin-split subbands in the vicinity of the subband crossing point, resulting in the emergence of a spin-acoustic resonance and the acoustoelectric current. Resonance peaks occur at acoustic frequencies of gigahertz range in the vicinity of the subband crossing point. An external magnetic field breaks the valley degeneracy, resulting in the valley-selective splitting of spin-acoustic resonances, both in surface acoustic wave absorption and acoustoelectric current.",

author = "K. Sonowal and Boev, {D. V.} and Kalameitsev, {A. V.} and Kovalev, {V. M.} and Savenko, {I. G.}",

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AU - Sonowal, K.

AU - Boev, D. V.

AU - Kalameitsev, A. V.

AU - Kovalev, V. M.

AU - Savenko, I. G.

PY - 2022/10/15

Y1 - 2022/10/15

N2 - The band structure of a monolayer MoS2 comprises spin-split subbands, owing to the mutual presence of broken inversion symmetry and strong spin-orbit coupling. In the conduction band, spin-valley coupled subbands cross each other at finite momenta, and they are valley degenerate. When exposed to surface acoustic waves, the emerging strain-induced effective magnetic fields can give rise to spin-flip transitions between the spin-split subbands in the vicinity of the subband crossing point, resulting in the emergence of a spin-acoustic resonance and the acoustoelectric current. Resonance peaks occur at acoustic frequencies of gigahertz range in the vicinity of the subband crossing point. An external magnetic field breaks the valley degeneracy, resulting in the valley-selective splitting of spin-acoustic resonances, both in surface acoustic wave absorption and acoustoelectric current.

AB - The band structure of a monolayer MoS2 comprises spin-split subbands, owing to the mutual presence of broken inversion symmetry and strong spin-orbit coupling. In the conduction band, spin-valley coupled subbands cross each other at finite momenta, and they are valley degenerate. When exposed to surface acoustic waves, the emerging strain-induced effective magnetic fields can give rise to spin-flip transitions between the spin-split subbands in the vicinity of the subband crossing point, resulting in the emergence of a spin-acoustic resonance and the acoustoelectric current. Resonance peaks occur at acoustic frequencies of gigahertz range in the vicinity of the subband crossing point. An external magnetic field breaks the valley degeneracy, resulting in the valley-selective splitting of spin-acoustic resonances, both in surface acoustic wave absorption and acoustoelectric current.

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Valley spin-acoustic resonance in MoS2 monolayers

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