π Resonance of Chemisorbed Alkali Atoms on Noble Metals

被引：31

作者：

Borisov, A. G. ^{[1
]}

Sametoglu, V. ^{[2
]}

Winkelmann, A. ^{[2
,3
]}

Kubo, A. ^{[2
,4
]}

Pontius, N. ^{[2
,5
]}

Zhao, J. ^{[2
]}

Silkin, V. M. ^{[6
,7
,8
]}

Gauyacq, J. P. ^{[1
]}

Chulkov, E. V. ^{[6
,7
,8
]}

Echenique, P. M. ^{[6
,7
,8
]}

Petek, H. ^{[2
,6
]}

机构：

[1] Univ Paris 11, CNRS, Lab Collis Atom & Mol, UMR 8625, F-91405 Orsay, France

[2] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

[3] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Germany

[4] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama, Japan

[5] BESSY mbh, D-12489 Berlin, Germany

[6] DIPC, San Sebastian 20018, Spain

[7] Univ Basque Country, CSIC, Ctr Fis Mat, E-20080 San Sebastian, Spain

[8] Univ Basque Country, Fac Quim, Dept Fis Mat, E-20080 San Sebastian, Spain

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.101.266801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed a joint experimental and theoretical study of the unoccupied electronic structure of alkali adsorbates on the (111) surfaces of Cu and Ag. Combining angle- and time-resolved two-photon photoemission spectroscopy with wave packet propagation calculations we show that, along with the well known sigma resonance oriented along the surface normal, there exist long-lived alkali-localized resonances oriented parallel to the surface (pi symmetry). These new resonances are stabilized by the projected band gap of the substrate and emerge primarily from the mixing of the p and d Rydberg orbitals of the free alkali atom modified by the interaction with the surface.

引用

页数：4

共 33 条

[1] Resonance lifetime and energy of an excited Cs state on Cu(111) [J].

Bauer, M ;

Pawlik, S ;

Aeschlimann, M .

PHYSICAL REVIEW B, 1997, 55 (15) :10040-10043

[2] 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

[3] Symmetry properties of an electronic alkali excitation at a noble metal surface as investigated by two-photon photoemission [J].

Bauer, M ;

Pawlik, S ;

Burgermeister, R ;

Aeschlimann, M .

SURFACE SCIENCE, 1998, 402 (1-3) :62-65

[4] HIGHER EXCITED-STATES IN X-RAY-ABSORPTION SPECTRA OF ADSORBATES [J].

BJORNEHOLM, O ;

NILSSON, A ;

ZDANSKY, EOF ;

SANDELL, A ;

TILLBORG, H ;

ANDERSEN, JN ;

MARTENSSON, N .

PHYSICAL REVIEW B, 1993, 47 (04) :2308-2319

[5] Scattering of hot electrons by adatoms at metal surfaces [J].

Boger, K ;

Weinelt, M ;

Fauster, T .

PHYSICAL REVIEW LETTERS, 2004, 92 (12) :126803-1

[6] Stabilisation of alkali-adsorbate-induced states on Cu(111)surfaces [J].

Borisov, AG ;

Kazansky, AK ;

Gauyacq, JP .

SURFACE SCIENCE, 1999, 430 (1-3) :165-175

[7]

Borisov AG, 2002, PHYS REV B, V65, DOI 10.1103/PhysRevB.65.235434

[8] Image potential states on metal surfaces: binding energies and wave functions [J].

Chulkov, EV ;

Silkin, VM ;

Echenique, PM .

SURFACE SCIENCE, 1999, 437 (03) :330-352

[9] COVERAGE-DEPENDENT ELECTRONIC-STRUCTURE OF NA ON CU(111) [J].

FISCHER, N ;

SCHUPPLER, S ;

FAUSTER, T ;

STEINMANN, W .

SURFACE SCIENCE, 1994, 314 (01) :89-96

[10] Quantum confinement in monatomic Cu chains on Cu(111) -: art. no. 056803 [J].

Fölsch, S ;

Hyldgaard, P ;

Koch, R ;

Ploog, KH .

PHYSICAL REVIEW LETTERS, 2004, 92 (05) :4

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