Planar Vacancies in Sn1-xBixTe Nanoribbons

Yi Chao Zou, Zhi Gang Chen, Fantai Kong, Jing Lin, John Drennan, Kyeongjae Cho, Zhongchang Wang, Jin Zou

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    14 Citations (Scopus)

    Abstract

    Vacancy engineering is a crucial approach to manipulate physical properties of semiconductors. Here, we demonstrate that planar vacancies are formed in Sn1-xBixTe nanoribbons by using Bi dopants via a facile chemical vapor deposition. Through combination of sub-angstrom-resolution imaging and density functional theory calculations, these planar vacancies are found to be associated with Bi segregations, which significantly lower their formation energies. The planar vacancies exhibit polymorphic structures with local variations in the lattice relaxation level, determined by their proximity to the nanoribbon surface. Such polymorphic planar vacancies, in conjunction with Bi dopants, trigger distinct localized electronic states, offering platforms for device applications of ternary chalcogenide materials.

    Original languageEnglish
    Pages (from-to)5507-5515
    Number of pages9
    JournalACS Nano
    Volume10
    Issue number5
    DOIs
    Publication statusPublished - 2016 May 24

    Keywords

    • chalcogenides
    • density functional theory
    • nanoribbon
    • scanning transmission electron microscopy
    • thermoelectric
    • vacancy

    ASJC Scopus subject areas

    • Engineering(all)
    • Materials Science(all)
    • Physics and Astronomy(all)

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