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Influence of surface electronic structure on quantum friction between Ag(111) slabs

机译：表面电子结构对Ag（111）平板之间量子摩擦的影响

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摘要

The theoretical formulation developed in Phys. Rev. B 83, 205424 (2011) is applied to explore how surface electronic structure modifies the noncontact friction force between two silver slabs. We find that the friction shows three distinct regimes for different thicknesses. For very thin slabs N = 1-7 monolayers (ML) quantum friction vs velocity shows oscillations which are due to the quantum size effect. At about 10ML friction rapidly increases because the surface state energies fall below E_F, which opens a new intraband electron-hole excitation channel. And for N＞ 15 the friction is strongly enhanced due to the excitation of acoustic surface plasmons.
机译：理论公式在物理学。修订版B 83，205424（2011）用于研究表面电子结构如何修改两个银板之间的非接触摩擦力。我们发现，摩擦对于不同的厚度显示出三种不同的状态。对于非常薄的平板，N = 1-7单层（ML）的量子摩擦力与速度的关系显示出由于量子尺寸效应而引起的振荡。在大约10ML时，摩擦迅速增加，因为表面态能量降到E_F以下，这打开了一条新的带内电子-空穴激励通道。对于N＞ 15，由于声表面等离子体激元的激发，摩擦力大大增强。

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  • 来源
    《Physical review》 |2015年第12期|125424.1-125424.10|共10页
  • 作者

    Vito Despoja; Vyacheslav M. Silkin; Pedro M. Echenique; Marijan Sunjic;

  • 作者单位

    Donostia International Physics Center (DIPC), P. Manuel de Lardizabal, 4, 20018 San Sebastian, Spain,Department of Physics, University of Zagreb, Bijenicka 32, HR-10000 Zagreb, Croatia,Departamento de Fisica de Materiales and Centro Mixto CSIC-UPV/EHU, Facultad de Ciencias Quimicas, Universidad del Pais Vasco UPV/EHU, Apto. 1072, 20080 San Sebastian, Spain;

    Donostia International Physics Center (DIPC), P. Manuel de Lardizabal, 4, 20018 San Sebastian, Spain,Departamento de Fisica de Materiales and Centro Mixto CSIC-UPV/EHU, Facultad de Ciencias Quimicas, Universidad del Pais Vasco UPV/EHU, Apto. 1072, 20080 San Sebastian, Spain,IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain;

    Donostia International Physics Center (DIPC), P. Manuel de Lardizabal, 4, 20018 San Sebastian, Spain,Departamento de Fisica de Materiales and Centro Mixto CSIC-UPV/EHU, Facultad de Ciencias Quimicas, Universidad del Pais Vasco UPV/EHU, Apto. 1072, 20080 San Sebastian, Spain;

    Donostia International Physics Center (DIPC), P. Manuel de Lardizabal, 4, 20018 San Sebastian, Spain,Department of Physics, University of Zagreb, Bijenicka 32, HR-10000 Zagreb, Croatia;

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  • 关键词

    atomic scale friction; channeling phenomena (blocking, energy loss, etc.); collective excitations (including excitons, polarons, plasmons and other charge-density excitations);

    机译：原子尺度摩擦窜流现象（阻塞;能量损失等）;集体激发（包括激子;极化子;等离激元和其他电荷密度激发）;

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