Negative longitudinal magnetoresistance in gallium arsenide quantum wells View Full Text


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Article Info

DATE

2019-01-17

AUTHORS

Jing Xu, Meng K., 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

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. More... »

PAGES

287

References to SciGraph publications

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    http://scigraph.springernature.com/pub.10.1038/s41467-018-08199-2

    DOI

    http://dx.doi.org/10.1038/s41467-018-08199-2

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1111375472

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/30655544


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    32 Weyl fermions
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    35 behavior
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    37 contribution
    38 defects
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    55 microscopic disorder
    56 model
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    58 observed NLMRs
    59 occurrence
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    61 pronounced NLMRs
    62 properties
    63 quantum wells
    64 results
    65 temperature
    66 three-resistor model
    67 topological materials
    68 transition
    69 types
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