Dynamically-generated pure spin current in single-layer graphene
Abstract
The conductance mismatch problem limits the spin-injection efficiency significantly, and spin-injection into graphene has been usually requiring high-quality tunnel barriers to circumvent the conductance mismatch. We introduce a novel approach, which enables generation of a pure spin current into single-layer graphene (SLG) free from electrical conductance mismatch by using dynamical spin injection. Experimental demonstration of spin-pumping-induced spin current generation and spin transport in SLG at room temperature was successfully achieved and the spin coherence was estimated to be 1.36 {\mu}m by using a conventional theoretical model based on Landau-Lifshitz-Gilbert equation. The spin coherence is proportional to the quality of SLG, which indicates that spin relaxation in SLG is governed by the Elliot-Yafet mechanism as was reported.
Cite
@article{arxiv.1211.0124,
title = {Dynamically-generated pure spin current in single-layer graphene},
author = {Zhenyao Tang1 and Eiji Shikoh1 and Hiroki Ago2 and Kenji Kawahara2 and Yuichiro Ando1 and Teruya Shinjo1 and Masashi Shiraishi1},
journal= {arXiv preprint arXiv:1211.0124},
year = {2015}
}
Comments
20pages, 4figures, Supplemental Materials