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arXiv · 1202.2067

Bias-dependent D'yakonov-Perel' spin relaxation in bilayer graphene

Mathias Diez·Guido Burkard
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Abstract

We calculate the spin relaxation time of mobile electrons due to spin precession between random impurity scattering (D'yakonov-Perel' mechanism) in electrically gated bilayer graphene analytically and numerically. Due to the trigonal warping of the bandstructure, the spin relaxation time exhibits an interesting non-monotonic behavior as a function of both the Fermi energy and the interlayer bias potential. Our results are in good agreement with recent four-probe measurements of the spin relaxation time in bilayer graphene and indicate the possibility of an electrically-switched spin device.

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Mathias Diez, Guido Burkard. 2012-02-09. Bias-dependent D'yakonov-Perel' spin relaxation in bilayer graphene. https://doi.org/10.1103/physrevb.85.195412

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