Magnetic field control of light-induced spin accumulation in monolayer MoSe<sub>2</sub>
نویسندگان
چکیده
Abstract Semiconductor transition metal dichalcogenides (TMDs) have equivalent dynamics for their two spin/valley species. This arises from energy-degenerated spin states, connected via time-reversal symmetry. When an out-of-plane magnetic field is applied, symmetry broken and the energies of spin-polarized bands shift, resulting in different bandgaps K + - valleys. Here, we use time-resolved Kerr rotation to study dependence monolayer MoSe 2 . We show that can control light-induced accumulation valley with a small effect on recombination lifetimes. unveil field-dependent agreement hole at longer timescales, indicating electron spins faster relaxation rates. propose rate equation model suggests lifting energy-degeneracy valleys induces ultrafast spin-flip toward stabilization higher valence band energy. Our results provide experimental insight into charge TMDs way it, which will be useful development new spintronic valleytronic applications.
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ژورنال
عنوان ژورنال: 2D materials
سال: 2023
ISSN: ['2053-1583']
DOI: https://doi.org/10.1088/2053-1583/acd12a