Scattering of hot electrons by adatoms at metal surfaces

被引：65

作者：

Boger, K ^{[1
]}

Weinelt, M ^{[1
]}

Fauster, T ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Lehrstuhl Festkorperphys, D-91058 Erlangen, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.92.126803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The scattering of electrons in image-potential states by Cu adatoms on Cu(001) surfaces has been investigated by means of time- and angle-resolved two-photon photoemission. Several interband and intraband-scattering mechanisms have been identified and their contributions to the total decay of the states determined quantitatively. The adsorbates mainly cause quasielastic scattering processes. Inelastic processes in contrast are due to interactions with electrons in the substrate and are not significantly increased by Cu adatoms. Quasielastic scattering into bulk bands contributes significantly to the depopulation of surface states.

引用

页码：126803 / 1

页数：4

共 20 条

[1] Decay dynamics of photoexcited alkali chemisorbates: Real-time investigations in the femtosecond regime [J].

Bauer, M ;

Pawlik, S ;

Aeschlimann, M .

PHYSICAL REVIEW B, 1999, 60 (07) :5016-5028

[2] Momentum-resolved lifetimes of image-potential states on Cu(100) -: art. no. 056805 [J].

Berthold, W ;

Höfer, U ;

Feulner, P ;

Chulkov, EV ;

Silkin, VM ;

Echenique, PM .

PHYSICAL REVIEW LETTERS, 2002, 88 (05) :568051-568054

[3] Resonant interband scattering of image-potential states [J].

Berthold, W ;

Güdde, J ;

Feulner, P ;

Höfer, U .

APPLIED PHYSICS B-LASERS AND OPTICS, 2001, 73 (08) :865-868

[4] Scattering by Cu adatoms between image-potential bands on Cu(001) [J].

Boger, K ;

Weinelt, M ;

Wang, J ;

Fauster, T .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2004, 78 (02) :161-164

[5] Linewidths in energy-resolved two-photon photoemission spectroscopy [J].

Boger, K ;

Roth, M ;

Weinelt, M ;

Fauster, T ;

Reinhard, PG .

PHYSICAL REVIEW B, 2002, 65 (07) :1-8

[6] Effect of various adsorbates in dephasing and population decay of the Cu(100) image potential states [J].

Borisov, AG ;

Gauyacq, JP ;

Kazansky, AK .

SURFACE SCIENCE, 2003, 540 (2-3) :407-419

[7] Long-lived excited states at surfaces: Cs/Cu(111) and Cs/Cu(100) systems [J].

Borisov, AG ;

Gauyacq, JP ;

Kazansky, AK ;

Chulkov, EV ;

Silkin, VM ;

Echenique, PM .

PHYSICAL REVIEW LETTERS, 2001, 86 (03) :488-491

[8]

Dai H.-L., 1995, LASER SPECTROSCOPY P

[9] ISLAND MORPHOLOGY AND ADATOM ENERGY BARRIERS DURING HOMOEPITAXY ON CU(001) [J].

DURR, H ;

WENDELKEN, JF ;

ZUO, JK .

SURFACE SCIENCE, 1995, 328 (1-2) :L527-L532

[10] EXISTENCE AND DETECTION OF RYDBERG STATES AT SURFACES [J].

ECHENIQUE, PM ;

PENDRY, JB .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1978, 11 (10) :2065-2075

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