Electron spin relaxation in graphene: The role of the substrate
- 24 July 2009
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 80 (4), 041405
- https://doi.org/10.1103/physrevb.80.041405
Abstract
Theory of the electron-spin relaxation in graphene on the substrate is developed. Charged impurities and polar-optical surface phonons in the substrate induce an effective random Bychkov-Rashba-like spin-orbit coupling field, which leads to spin relaxation by the D’yakonov-Perel’ mechanism. Analytical estimates and Monte Carlo simulations show that the corresponding spin relaxation times are between micro- to milliseconds, being only weakly temperature dependent. It is also argued that the presence of adatoms on graphene can lead to spin lifetimes shorter than nanoseconds.
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