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Strain Engineering of the Berry Curvature Dipole and Valley Magnetization in Monolayer MoS_{2}
Joolee Son1, Kyung-Han Kim2, Y H Ahn1
1Department of Physics and Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
Abstract:
The Berry curvature dipole is a physical quantity that is expected to allow various quantum geometrical phenomena in a range of solid-state systems. Monolayer transition metal dichalcogenides provide an exceptional platform to modulate and investigate the Berry curvature dipole through strain. Here, we theoretically demonstrate and experimentally verify for monolayer MoS_{2} the generation of valley orbital magnetization as a response to an in-plane electric field due to the Berry curvature dipole. The measured valley orbital magnetization shows excellent agreement with the calculated Berry curvature dipole, which can be controlled by the magnitude and direction of strain. Our results show that the Berry curvature dipole acts as an effective magnetic field in current-carrying systems, providing a novel route to generate magnetization.
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