Large positive in-plane magnetoresistance induced by localized states at nanodomain boundaries in graphene

Han-Chun Wu (), Alexander N. Chaika (), Ming-Chien Hsu, Tsung-Wei Huang, Mourad Abid, Mohamed Abid, Victor Yu Aristov, Olga V. Molodtsova, Sergey V. Babenkov, Yuran Niu, Barry E. Murphy, Sergey A. Krasnikov, Olaf Lübben, Huajun Liu, Byong Sun Chun, Yahya T. Janabi, Sergei N. Molotkov, Igor V. Shvets, Alexander I. Lichtenstein, Mikhail I. Katsnelson and Ching-Ray Chang ()
Additional contact information
Han-Chun Wu: School of Physics, Beijing Institute of Technology
Alexander N. Chaika: School of Physics, Centre for Research on Adaptive Nanostructures and Nanodevices, Trinity College Dublin
Ming-Chien Hsu: National Taiwan University
Tsung-Wei Huang: National Taiwan University
Mourad Abid: School of Physics, Beijing Institute of Technology
Mohamed Abid: School of Physics, Beijing Institute of Technology
Victor Yu Aristov: Institute of Solid State Physics of Russian Academy of Sciences
Olga V. Molodtsova: Deutsches Elektronen-Synchrotron DESY
Sergey V. Babenkov: Deutsches Elektronen-Synchrotron DESY
Yuran Niu: MAX-lab, Lund University
Barry E. Murphy: School of Physics, Centre for Research on Adaptive Nanostructures and Nanodevices, Trinity College Dublin
Sergey A. Krasnikov: School of Physics, Centre for Research on Adaptive Nanostructures and Nanodevices, Trinity College Dublin
Olaf Lübben: School of Physics, Centre for Research on Adaptive Nanostructures and Nanodevices, Trinity College Dublin
Huajun Liu: Institute of Plasma Physics, Chinese Academy of Sciences
Byong Sun Chun: Korea Research Institute of Standards and Science
Yahya T. Janabi: Saudi Aramco Materials Performance Unit TSD, Research and Development Center
Sergei N. Molotkov: Institute of Solid State Physics of Russian Academy of Sciences
Igor V. Shvets: School of Physics, Centre for Research on Adaptive Nanostructures and Nanodevices, Trinity College Dublin
Alexander I. Lichtenstein: Institut für Theoretische Physik, Universität Hamburg
Mikhail I. Katsnelson: Ural Federal University
Ching-Ray Chang: National Taiwan University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Graphene supports long spin lifetimes and long diffusion lengths at room temperature, making it highly promising for spintronics. However, making graphene magnetic remains a principal challenge despite the many proposed solutions. Among these, graphene with zig-zag edges and ripples are the most promising candidates, as zig-zag edges are predicted to host spin-polarized electronic states, and spin–orbit coupling can be induced by ripples. Here we investigate the magnetoresistance of graphene grown on technologically relevant SiC/Si(001) wafers, where inherent nanodomain boundaries sandwich zig-zag structures between adjacent ripples of large curvature. Localized states at the nanodomain boundaries result in an unprecedented positive in-plane magnetoresistance with a strong temperature dependence. Our work may offer a tantalizing way to add the spin degree of freedom to graphene.

Date: 2017
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DOI: 10.1038/ncomms14453

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