Defect-mediated spin relaxation and dephasing in graphene

A principal motivation to develop graphene for future devices has been its promise for quantum spintronics. Hyperfine and spin-orbit interactions are expected to be negligible in single-layer graphene. Spin transport experiments, on the other hand, show that graphene's spin relaxation is orders...

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Bibliographic Details
Published inarXiv.org
Main Authors Lundeberg, Mark B, Yang, Rui, Renard, Julien, Folk, Joshua A
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 06.11.2012
Subjects
Graphene
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Spin-orbit interactions
Spintronics
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Summary:A principal motivation to develop graphene for future devices has been its promise for quantum spintronics. Hyperfine and spin-orbit interactions are expected to be negligible in single-layer graphene. Spin transport experiments, on the other hand, show that graphene's spin relaxation is orders of magnitude faster than predicted. We present a quantum interference measurement that disentangles sources of magnetic and non-magnetic decoherence in graphene. Magnetic defects are shown to be the primary cause of spin relaxation, while spin-orbit interaction is undetectably small.
ISSN:2331-8422
DOI:10.48550/arxiv.1211.1417