Quantum size effects in Pb/Si(111) investigated by laser-induced photoemission

被引：41

作者：

Kirchmann, P. S.

Wolf, M.

Dil, J. H.

Horn, K.

Bovensiepen, U.

机构：

[1] Free Univ Berlin, Fachbereich Phys, D-14195 Berlin, Germany

[2] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW B | 2007年 / 76卷 / 07期

关键词：

D O I：

10.1103/PhysRevB.76.075406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use laser-induced photoemission spectroscopy at 6 eV photon energy to investigate quantum well states of epitaxial Pb films on Si(111) as function of film thickness. The binding energies of the quantum well states were found in good agreement with density-functional calculations for a freestanding Pb slab. An oscillation of the work function with a period of 2 ML was observed as a function of film thickness, which correlates well with the oscillatory electron density at the Fermi level determined from the photoemission spectra.

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页数：5

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