Spin conductance of diffusive graphene nanoribbons: A probe of zigzag edge magnetization

Jan Bundesmann, Ming Hao Liu, Inanç Adagideli, Klaus Richter

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

We investigate spin transport in diffusive graphene nanoribbons with both clean and rough zigzag edges, and long-range potential fluctuations. The long-range fields along the ribbon edges cause the local doping to come close to the charge neutrality point forming p-n junctions with localized magnetic moments, similar to the predicted magnetic edge of clean zigzag graphene nanoribbons. The resulting random edge magnetization polarizes charge currents and causes sample-to-sample fluctuations of the spin currents obeying universal predictions. We show furthermore that, although the average spin conductance vanishes, an applied transverse in-plane electric field can generate a finite spin conductance. A similar effect can also be achieved by aligning the edge magnetic moments through an external magnetic field.

Original languageEnglish
Article number195406
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume88
Issue number19
DOIs
Publication statusPublished - 2013 Nov 12

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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