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- W2806637622 abstract "Inversion-symmetric materials are forbidden to show an overall spin texture in their band structure in the presence of time-reversal symmetry. However, in van der Waals materials which lack inversion symmetry within a single layer, it has been proposed that a layer-dependent spin texture can arise leading to a coupled spin-layer degree of freedom. Here we use time-resolved Kerr rotation in inversion-symmetric ${mathrm{WSe}}_{2}$ and ${mathrm{MoSe}}_{2}$ bulk crystals to study this spin-layer polarization and unveil its dynamics. Our measurements show that the spin-layer relaxation time in ${mathrm{WSe}}_{2}$ is limited by phonon scattering at high temperatures and that the interlayer hopping can be tuned by a small in-plane magnetic field at low temperatures, enhancing the relaxation rates. We find a significantly lower lifetime for ${mathrm{MoSe}}_{2}$ which agrees with theoretical expectations of a spin-layer polarization stabilized by the larger spin-orbit coupling in ${mathrm{WSe}}_{2}$." @default.
- W2806637622 created "2018-06-13" @default.
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- W2806637622 date "2018-06-29" @default.
- W2806637622 modified "2023-09-26" @default.
- W2806637622 title "Spin Accumulation and Dynamics in Inversion-Symmetric van der Waals Crystals" @default.
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- W2806637622 doi "https://doi.org/10.1103/physrevlett.120.266801" @default.
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