Modulation of electrical potential and conductivity in an atomic-layer semiconductor heterojunction View Full Text


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Article Info

DATE

2016-11

AUTHORS

Yu Kobayashi, Shoji Yoshida, Ryuji Sakurada, Kengo Takashima, Takahiro Yamamoto, Tetsuki Saito, Satoru Konabe, Takashi Taniguchi, Kenji Watanabe, Yutaka Maniwa, Osamu Takeuchi, Hidemi Shigekawa, Yasumitsu Miyata

ABSTRACT

Semiconductor heterojunction interfaces have been an important topic, both in modern solid state physics and in electronics and optoelectronics applications. Recently, the heterojunctions of atomically-thin transition metal dichalcogenides (TMDCs) are expected to realize one-dimensional (1D) electronic systems at their heterointerfaces due to their tunable electronic properties. Herein, we report unique conductivity enhancement and electrical potential modulation of heterojunction interfaces based on TMDC bilayers consisted of MoS2 and WS2. Scanning tunneling microscopy/spectroscopy analyses showed the formation of 1D confining potential (potential barrier) in the valence (conduction) band, as well as bandgap narrowing around the heterointerface. The modulation of electronic properties were also probed as the increase of current in conducting atomic force microscopy. Notably, the observed band bending can be explained by the presence of 1D fixed charges around the heterointerface. The present findings indicate that the atomic layer heterojunctions provide a novel approach to realizing tunable 1D electrical potential for embedded quantum wires and ultrashort barriers of electrical transport. More... »

PAGES

31223

References to SciGraph publications

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  • Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/srep31223

    DOI

    http://dx.doi.org/10.1038/srep31223

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1018379355

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/27515115


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    291 https://www.grid.ac/institutes/grid.419082.6 schema:alternateName Japan Science and Technology Agency
    292 schema:name Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
    293 JST-PRESTO, Kawaguchi, Saitama 332-0012, Japan
    294 rdf:type schema:Organization
     




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