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首页> 外文期刊>Physical review >Origin of ordered two-dimensional structure of Si(337)-4 ×1 transformed from Si(5 5 12)-2×1
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Origin of ordered two-dimensional structure of Si(337)-4 ×1 transformed from Si(5 5 12)-2×1

机译：从Si（5 5 12）-2×1转换成Si（337）-4×1的有序二维结构的起源

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摘要

Through combined studies using scanning tunneling microscopy (STM) and high-energy-resolution synchrotron photoemission, the origin of irreversible structural transformation from Si(5 5 12)-2×1 to Si(337)-4 × 1 with (113) facets has been investigated. From the C-dosed Si(5 5 12) Surface, it has been found by STM that the transformation from (5 5 12) to (337) starts from a tetramer (T) row and a π-bonded (π) chain in the (5 5 12) surface, and simultaneously the rest part of (5 5 12) converts to T rows and π chains, which will be transformed to (337) with additional Si atoms. By Si 2p and C 1s core-level photoemission studies using synchrotron radiation on the identical system, it has been confirmed that such an irreversible structural transformation is due to subsurface C atoms. If the (337) terrace is only composed of T rows and π chains with a 2× periodicity, the compressive stress exists so that the (337) terrace becomes unstable. However, subsurface C atoms release this compressive stress through breaking one-dimensional structures and induce a stable surface composed of 4 × 1 dotlike structures with additional Si atoms.
机译：通过使用扫描隧道显微镜（STM）和高能分辨率同步加速器光发射的组合研究，不可逆结构转变从Si（5 5 12）-2×1到具有（113）面的Si（337）-4×1已被调查。从C剂量的Si（5 5 12）表面，通过STM发现，从（5 5 12）到（337）的转变始于四聚体（T）行和π键（π）链。 （5 5 12）表面，同时（5 5 12）的其余部分转换为T行和π链，它们将与其他Si原子转化为（337）。通过在同一系统上使用同步加速器辐射进行的Si 2p和C 1s核心能级光发射研究，已证实这种不可逆的结构转变是由于表面下的C原子引起的。如果（337）平台仅由T行和具有2x周期性的π链组成，则存在压缩应力，因此（337）平台变得不稳定。但是，地下C原子通过破坏一维结构释放此压缩应力，并诱导出由4×1点状结构和附加的Si原子组成的稳定表面。

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  • 来源
    《Physical review》 |2010年第24期|P.245422.1-245422.8|共8页
  • 作者

    Hidong Kim; Ganbat Duvjir; Otgonbayar Dugerjav; Huiting Li; Jae M. Seo;

  • 作者单位

    Department of Physics and Institute of Photonics and Information Technology, Chonbuk National University,Jeonju 561-756, Republic of Korea;

    rnDepartment of Physics and Institute of Photonics and Information Technology, Chonbuk National University,Jeonju 561-756, Republic of Korea;

    rnDepartment of Physics and Institute of Photonics and Information Technology, Chonbuk National University,Jeonju 561-756, Republic of Korea;

    rnDepartment of Physics and Institute of Photonics and Information Technology, Chonbuk National University,Jeonju 561-756, Republic of Korea;

    rnDepartment of Physics and Institute of Photonics and Information Technology, Chonbuk National University,Jeonju 561-756, Republic of Korea;

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  • 关键词

    scanning tunneling microscopy (including chemistry induced with STM); photoemission and photoelectron spectra;

    机译：扫描隧道显微镜（包括用STM诱导的化学反应）;光发射和光电子能谱;

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