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

Jan Bundesmann, Ming-Hao Liu, Inanc Adagideli, Klaus Richter

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11 Citations (Scopus)
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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)
Issue number19
Publication statusPublished - 15 Nov 2013
Externally publishedYes


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