Lifetimes of quantum well states and resonances in Pb overlayers on Cu(111)

被引：19

作者：

Zugarramurdi, A. ^{[1
,2
]}

Zabala, N. ^{[1
,2
,3
]}

Silkin, V. M. ^{[2
,3
,4
,5
]}

Borisov, A. G. ^{[6
]}

Chulkov, E. V. ^{[2
,3
,4
]}

机构：

[1] Univ Basque Country, Zientzia Eta Teknol Fak, Bilbao 48080, Spain

[2] CSIC Univ Basque Country, Ctr Fis Mat CFM, Ctr Mixto, San Sebastian 20018, Spain

[3] DIPC, San Sebastian 20018, Spain

[4] Univ Basque Country, Dept Fis Mat, Fac Ciencias Quim, San Sebastian 20080, Spain

[5] Basque Fdn Sci, IKERBASQUE, Bilbao 48011, Spain

[6] Univ Paris Sud, Collis Atom & Mol Lab, CNRS, UMR 8625, F-91405 Orsay, France

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 11期

关键词：

IMAGE-POTENTIAL STATES; ELECTRONIC-STRUCTURE; METAL-SURFACE; CHARGE-TRANSFER; DENSITY; ENERGY; SUPERCONDUCTIVITY; EXCITATIONS; SCATTERING; DYNAMICS;

D O I：

10.1103/PhysRevB.80.115425

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present results of calculations of the lifetimes of excited electrons (holes) in quantum well states and quantum well resonances in Pb overlayers supported on Cu(111). Many-body decay via inelastic energy relaxation and one-electron decay via energy-conserving one-electron transfer into the substrate are considered. One-electron energies and wave functions have been computed for different coverages of the Pb overlayer (from 1 to 18 monolayers) by using a one-dimensional pseudopotential for the entire overlayer-substrate system in the framework of density functional theory within the local density approximation. The elastic (energy-conserving resonant electron transfer) contribution to the total lifetime broadening of quantum well resonances has been calculated within the wave packet propagation method. The inelastic electron-electron (many-body) contribution to the lifetime broadening of both occupied and unoccupied quantum well states has been evaluated using GW approximation. The decay mechanisms of both quantum well states and quantum well resonances in thick overlayers are discussed.

引用

页数：11

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