Electron spin relaxation in carbon nanotubes
Materials Science
2015-05-18 v1
Abstract
The long standing problem of inexplicably short spin relaxation in carbon nanotubes (CNTs) is examined. The curvature-mediated spin-orbital interaction is shown to induce fluctuating electron spin precession causing efficient relaxation in a manner analogous to the Dyakonov-Perel mechanism. Our calculation estimates longitudinal (spin-flip) and transversal (decoherence) relaxation times as short as 150 ps and 110 ps at room temperature, respectively, along with a pronounced anisotropic dependence. Interference of electrons originating from different valleys can lead to even faster dephasing. The results can help clarify the measured data, resolving discrepancies in the literature.
Cite
@article{arxiv.1001.4020,
title = {Electron spin relaxation in carbon nanotubes},
author = {Y. G. Semenov and J. M. Zavada and K. W. Kim},
journal= {arXiv preprint arXiv:1001.4020},
year = {2015}
}
Comments
9 pages, 3 figures