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arXiv · 2206.11551

Valley spin-acoustic resonance in MoS${\bf _2}$ monolayers

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

The band structure of a monolayer MoS$_2$ comprises of 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 field can give rise to spin-flip transitions between the spin-split subbands in the vicinity of subbands crossing point, resulting in the emergence of a spin-acoustic resonance and the acoustoelectric current. 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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K. Sonowal, D. V. Boev, A. V. Kalameitsev, V. M. Kovalev, I. G. Savenko. 2022-06-23. Valley spin-acoustic resonance in MoS${\bf _2}$ monolayers. https://doi.org/10.1103/physrevb.106.155426

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