Long Spin Diffusion Length in Few-Layer Graphene Flakes

Research output: Contribution to journalArticle

Details

Original languageEnglish
Article number147201
Pages (from-to)1-6
JournalPhysical Review Letters
Volume117
Issue number14
StatePublished - 27 Sep 2016
MoE publication typeA1 Journal article-refereed

Researchers

Research units

  • University of Cambridge
  • Diamond Light Source
  • University of Parma

Abstract

We report a spin valve with a few-layer graphene flake bridging highly spin-polarized La0.67Sr0.33MnO3 electrodes, whose surfaces are kept clean during lithographic definition. Sharp magnetic switching is verified using photoemission electron microscopy with x-ray magnetic circular dichroism contrast. A naturally occurring high interfacial resistance ∼12 MΩ facilitates spin injection, and a large resistive switching (0.8 MΩ at 10 K) implies a 70-130 μm spin diffusion length that exceeds previous values obtained with sharp-switching electrodes.

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