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Mo_6S_3Br_6: An Anisotropic 2D Superatomic Semiconductor

机译：Mo_6S_3Br_6：各向异性二维超原子半导体

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摘要

Two-dimensional (2D) van der Waals materials with in-plane anisotropy are of great interest for directional transport of charge and energy, as exemplified by recent studies on black phosphorus and alpha-phase molybdenum trioxide (alpha-MO3). Here, a layered van der Waals semiconductor with in-plane anisotropy built upon the superatomic units of Mo6S3Br6 is reported. This material possesses robust 2D characteristics with a direct gap of 1.64 eV, as determined by scanning tunneling spectroscopy and first-principles calculations. Polarization-dependent Raman spectroscopy measurement and density functional theory calculation reveal strong in-plane anisotropy. These results suggest an effective strategy to explore anisotropic 2D electronic and optoelectronic properties from superatomic building blocks with multifunctionality, emergent properties, and hierarchical control.
机译：具有平面内各向异性的二维（2D）Van der Waals材料对于电荷和能量的定向传输非常感兴趣，最近对黑磷和α相三氧化钼（alpha-MO3）的研究证明了这一点。在此，报道了在Mo 6 S 3 Br 6的超原子单元上建立具有面内各向异性的层状范德华半导体。这种材料具有稳固的2D特性，其直接间隙为1.64 eV，这由扫描隧道光谱法和第一性原理计算确定。偏振相关的拉曼光谱测量和密度泛函理论计算显示出很强的面内各向异性。这些结果表明，从具有多功能性，紧急特性和层次控制的超原子构造块中探索各向异性的2D电子和光电特性的有效策略。

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  • 来源
    《Advanced Functional Materials》 |2019年第33期|1902951.1-1902951.7|共7页
  • 作者

    Zhong Xinjue; Lee Kihong; Meggiolaro Daniele; Dismukes Avalon H.; Choi Bonnie; Wang Feifan; Nuckolls Colin; Paley Daniel W.; Batail Patrick; De Angelis Filippo; Roy Xavier; Zhu Xiaoyang-Y;

  • 作者单位

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    CNR ISTM, Computat Lab Hybrid Organ Photovolta CLHYO, Via Elce di Sotto 8, I-06123 Perugia, Italy|Ist Italiano Tecnol, CompuNet D3, Via Morego 30, I-16163 Genoa, Italy;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Columbia Nano Initiat, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA|Univ Angers, Lab MOLTECH, CNRS UMR 6200, F-49045 Angers, France;

    CNR ISTM, Computat Lab Hybrid Organ Photovolta CLHYO, Via Elce di Sotto 8, I-06123 Perugia, Italy|Ist Italiano Tecnol, CompuNet D3, Via Morego 30, I-16163 Genoa, Italy;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

    Columbia Univ, Dept Chem, New York, NY 10027 USA;

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  • 正文语种 eng
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  • 关键词

    2D van der Waals solid; anisotropic phonons; 2D semiconductor;

    机译：2d van der waals固体;各向异性声子;2d半导体;

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