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arXiv · 1211.1417

Defect-mediated spin relaxation and dephasing in graphene

Mark B. Lundeberg·Rui Yang·Julien Renard·Joshua A. Folk
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Abstract

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.

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Mark B. Lundeberg, Rui Yang, Julien Renard, Joshua A. Folk. 2012-11-06. Defect-mediated spin relaxation and dephasing in graphene. https://doi.org/10.1103/physrevlett.110.156601

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