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- W3099928962 abstract "We investigate spin relaxation in rippled graphene where curvature induces a Zeeman-like spin-orbit coupling with opposite effective magnetic fields along the graphene plane in K and K′ valleys. The joint effect of this Zeeman-like spin-orbit coupling and the intervalley electron-optical phonon scattering opens a spin relaxation channel, which manifests itself in low-mobility samples with the electron mean free path being smaller than the ripple size. Due to this spin relaxation channel, with the increase of temperature, the relaxation time for spins perpendicular to the effective magnetic field first decreases and then increases, with a minimum of several hundred picoseconds around room temperature. However, the spin relaxation along the effective magnetic field is determined by the curvature-induced Rashba-type spin-orbit coupling, leading to a temperature-insensitive spin relaxation time of the order of microseconds. Therefore, the in-plane spin relaxation in low-mobility rippled graphene is anisotropic. Nevertheless, in the presence of a small perpendicular magnetic field, as usually applied in the Hanle spin precession measurement, the anisotropy of spin relaxation is strongly suppressed. The spin relaxation channel revealed in this work contributes to spin relaxation around room temperature in rippled graphene with low mobility." @default.
- W3099928962 created "2020-11-23" @default.
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- W3099928962 date "2012-10-01" @default.
- W3099928962 modified "2023-09-26" @default.
- W3099928962 title "Electron spin relaxation in rippled graphene with low mobilities" @default.
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- W3099928962 doi "https://doi.org/10.1063/1.4757417" @default.
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