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Negative longitudinal magnetoresistance in gallium arsenide quantum wells

Author

Listed:
  • Jing Xu

    (Materials Science Division
    Northern Illinois University)

  • Meng K. Ma

    (Princeton University)

  • Maksim Sultanov

    (Northern Illinois University)

  • Zhi-Li Xiao

    (Materials Science Division
    Northern Illinois University)

  • Yong-Lei Wang

    (Materials Science Division
    Nanjing University)

  • Dafei Jin

    (Center for Nanoscale Materials)

  • Yang-Yang Lyu

    (Materials Science Division
    Nanjing University)

  • Wei Zhang

    (Materials Science Division
    Oakland University)

  • Loren N. Pfeiffer

    (Princeton University)

  • Ken W. West

    (Princeton University)

  • Kirk W. Baldwin

    (Princeton University)

  • Mansour Shayegan

    (Princeton University)

  • Wai-Kwong Kwok

    (Materials Science Division)

Abstract

Negative longitudinal magnetoresistances (NLMRs) have been recently observed in a variety of topological materials and often considered to be associated with Weyl fermions that have a defined chirality. Here we report NLMRs in non-Weyl GaAs quantum wells. In the absence of a magnetic field the quantum wells show a transition from semiconducting-like to metallic behaviour with decreasing temperature. We observe pronounced NLMRs up to 9 Tesla at temperatures above the transition and weak NLMRs in low magnetic fields at temperatures close to the transition and below 5 K. The observed NLMRs show various types of magnetic field behaviour resembling those reported in topological materials. We attribute them to microscopic disorder and use a phenomenological three-resistor model to account for their various features. Our results showcase a contribution of microscopic disorder in the occurrence of unusual phenomena. They may stimulate further work on tuning electronic properties via disorder/defect nano-engineering.

Suggested Citation

  • Jing Xu & Meng K. Ma & Maksim Sultanov & Zhi-Li Xiao & Yong-Lei Wang & Dafei Jin & Yang-Yang Lyu & Wei Zhang & Loren N. Pfeiffer & Ken W. West & Kirk W. Baldwin & Mansour Shayegan & Wai-Kwong Kwok, 2019. "Negative longitudinal magnetoresistance in gallium arsenide quantum wells," Nature Communications, Nature, vol. 10(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-018-08199-2
    DOI: 10.1038/s41467-018-08199-2
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