Electron-Phonon Coupling Constant of Metallic Overlayers from Specular He Atom Scattering

被引：22

作者：

Benedek, G. ^{[1
,2
]}

Miret-Artes, Salvador ^{[1
,3
]}

Toennies, J. P. ^{[4
]}

Manson, J. R. ^{[1
,5
]}

机构：

[1] DIPC, Paseo Manuel de Lardizabal 4, Donostia San Sebastian 20018, Spain

[2] Univ Milano Bicocca, Dipartimento Sci Mat, Via Cozzi 53, I-20125 Milan, Italy

[3] CSIC, Inst Fis Fundamental, Serrano 123, Madrid 28006, Spain

[4] Max Planck Inst Dynam & Selbstorg, Fassberg 17, D-37077 Gottingen, Germany

[5] Clemson Univ, Dept Phys & Astron, Clemson, SC 29634 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2018年 / 9卷 / 01期

关键词：

BAND-STRUCTURE; WORK FUNCTION; HELIUM; FILMS; DYNAMICS; SURFACES; GROWTH; PB;

D O I：

10.1021/acs.jpclett.7b03047

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

He atom scattering has been shown to be a sensitive probe of electron phonon interaction properties at surfaces. Here it is shown that measurements of the thermal attenuation of the specular He atom diffraction peak (the Debye-Waller effect) can determine the electron-phonon coupling constant, lambda, for ultrathin films of metal overlayers on various close-packed metal substrates. Values of lambda obtained for single and multiple monolayers of alkali metals, and for Pb layers on Cu(111), extrapolated to large thicknesses, agree favorably with known bulk values. This demonstrates that He atom scattering can measure the electron-phonon coupling strength as a function of film thickness on a layer-by-layer basis.

引用

页码：76 / 83

页数：8

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