Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces

K. Schubert, A. Damm, S. V. Eremeev, M. Marks, Masahiro Shibuta, W. Berthold, J. Güdde, A. G. Borisov, S. S. Tsirkin, E. V. Chulkov, U. Höfer

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The dependence of the inelastic lifetime of electrons in the first n=1 image-potential state of clean and rare-gas covered Ag(111), Cu(111), and Cu(100) surfaces on their momentum parallel to the surface has been studied experimentally by means of time- and angle-resolved two-photon photoemission spectroscopy (2PPE) and theoretically by calculations based on the many-body theory within the self-energy formalism. Similar to the previously studied clean Cu(100) surface, the theoretical results are in excellent agreement with the experiment findings for Cu(111). For Ag(111), the theory overestimates the decay rate and its momentum dependence, which is attributed to the neglect of surface plasmon excitations. With increasing parallel momentum, the n=1 state shifts out of the projected bulk band gap on both surfaces and turns into an image-potential resonance. This opens an additional decay channel by resonant electron transfer into the bulk, which is theoretically treated by the application of the wave packet propagation approach. The expected stronger increase of the decay rate upon crossing the edge of the band gap, however, is not observed in the experiment. The decoupling of the image-potential states from the metal surface upon adsorption of rare-gas layers results in a decrease of the decay rate as well as of its momentum dependence by a similar factor, which can be successfully explained by the change of interband and intraband contributions to the total decay rate.

Original languageEnglish
Article number205431
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number20
DOIs
Publication statusPublished - 2012 May 15
Externally publishedYes

Fingerprint

Momentum
decay rates
momentum
Electrons
Noble Gases
electrons
Inert gases
rare gases
Energy gap
Wave packets
decoupling
wave packets
metal surfaces
Photoelectron spectroscopy
electron transfer
photoelectric emission
formalism
Photons
life (durability)
Metals

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Schubert, K., Damm, A., Eremeev, S. V., Marks, M., Shibuta, M., Berthold, W., ... Höfer, U. (2012). Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces. Physical Review B - Condensed Matter and Materials Physics, 85(20), [205431]. https://doi.org/10.1103/PhysRevB.85.205431

Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces. / Schubert, K.; Damm, A.; Eremeev, S. V.; Marks, M.; Shibuta, Masahiro; Berthold, W.; Güdde, J.; Borisov, A. G.; Tsirkin, S. S.; Chulkov, E. V.; Höfer, U.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 20, 205431, 15.05.2012.

Research output: Contribution to journalArticle

Schubert, K, Damm, A, Eremeev, SV, Marks, M, Shibuta, M, Berthold, W, Güdde, J, Borisov, AG, Tsirkin, SS, Chulkov, EV & Höfer, U 2012, 'Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces', Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 20, 205431. https://doi.org/10.1103/PhysRevB.85.205431
Schubert, K. ; Damm, A. ; Eremeev, S. V. ; Marks, M. ; Shibuta, Masahiro ; Berthold, W. ; Güdde, J. ; Borisov, A. G. ; Tsirkin, S. S. ; Chulkov, E. V. ; Höfer, U. / Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces. In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 20.
@article{c74d67b9fdce44dc9c3ba56f9f7b428c,
title = "Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces",
abstract = "The dependence of the inelastic lifetime of electrons in the first n=1 image-potential state of clean and rare-gas covered Ag(111), Cu(111), and Cu(100) surfaces on their momentum parallel to the surface has been studied experimentally by means of time- and angle-resolved two-photon photoemission spectroscopy (2PPE) and theoretically by calculations based on the many-body theory within the self-energy formalism. Similar to the previously studied clean Cu(100) surface, the theoretical results are in excellent agreement with the experiment findings for Cu(111). For Ag(111), the theory overestimates the decay rate and its momentum dependence, which is attributed to the neglect of surface plasmon excitations. With increasing parallel momentum, the n=1 state shifts out of the projected bulk band gap on both surfaces and turns into an image-potential resonance. This opens an additional decay channel by resonant electron transfer into the bulk, which is theoretically treated by the application of the wave packet propagation approach. The expected stronger increase of the decay rate upon crossing the edge of the band gap, however, is not observed in the experiment. The decoupling of the image-potential states from the metal surface upon adsorption of rare-gas layers results in a decrease of the decay rate as well as of its momentum dependence by a similar factor, which can be successfully explained by the change of interband and intraband contributions to the total decay rate.",
author = "K. Schubert and A. Damm and Eremeev, {S. V.} and M. Marks and Masahiro Shibuta and W. Berthold and J. G{\"u}dde and Borisov, {A. G.} and Tsirkin, {S. S.} and Chulkov, {E. V.} and U. H{\"o}fer",
year = "2012",
month = "5",
day = "15",
doi = "10.1103/PhysRevB.85.205431",
language = "English",
volume = "85",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "20",

}

TY - JOUR

T1 - Momentum-resolved electron dynamics of image-potential states on Cu and Ag surfaces

AU - Schubert, K.

AU - Damm, A.

AU - Eremeev, S. V.

AU - Marks, M.

AU - Shibuta, Masahiro

AU - Berthold, W.

AU - Güdde, J.

AU - Borisov, A. G.

AU - Tsirkin, S. S.

AU - Chulkov, E. V.

AU - Höfer, U.

PY - 2012/5/15

Y1 - 2012/5/15

N2 - The dependence of the inelastic lifetime of electrons in the first n=1 image-potential state of clean and rare-gas covered Ag(111), Cu(111), and Cu(100) surfaces on their momentum parallel to the surface has been studied experimentally by means of time- and angle-resolved two-photon photoemission spectroscopy (2PPE) and theoretically by calculations based on the many-body theory within the self-energy formalism. Similar to the previously studied clean Cu(100) surface, the theoretical results are in excellent agreement with the experiment findings for Cu(111). For Ag(111), the theory overestimates the decay rate and its momentum dependence, which is attributed to the neglect of surface plasmon excitations. With increasing parallel momentum, the n=1 state shifts out of the projected bulk band gap on both surfaces and turns into an image-potential resonance. This opens an additional decay channel by resonant electron transfer into the bulk, which is theoretically treated by the application of the wave packet propagation approach. The expected stronger increase of the decay rate upon crossing the edge of the band gap, however, is not observed in the experiment. The decoupling of the image-potential states from the metal surface upon adsorption of rare-gas layers results in a decrease of the decay rate as well as of its momentum dependence by a similar factor, which can be successfully explained by the change of interband and intraband contributions to the total decay rate.

AB - The dependence of the inelastic lifetime of electrons in the first n=1 image-potential state of clean and rare-gas covered Ag(111), Cu(111), and Cu(100) surfaces on their momentum parallel to the surface has been studied experimentally by means of time- and angle-resolved two-photon photoemission spectroscopy (2PPE) and theoretically by calculations based on the many-body theory within the self-energy formalism. Similar to the previously studied clean Cu(100) surface, the theoretical results are in excellent agreement with the experiment findings for Cu(111). For Ag(111), the theory overestimates the decay rate and its momentum dependence, which is attributed to the neglect of surface plasmon excitations. With increasing parallel momentum, the n=1 state shifts out of the projected bulk band gap on both surfaces and turns into an image-potential resonance. This opens an additional decay channel by resonant electron transfer into the bulk, which is theoretically treated by the application of the wave packet propagation approach. The expected stronger increase of the decay rate upon crossing the edge of the band gap, however, is not observed in the experiment. The decoupling of the image-potential states from the metal surface upon adsorption of rare-gas layers results in a decrease of the decay rate as well as of its momentum dependence by a similar factor, which can be successfully explained by the change of interband and intraband contributions to the total decay rate.

UR - http://www.scopus.com/inward/record.url?scp=84861552722&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84861552722&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.205431

DO - 10.1103/PhysRevB.85.205431

M3 - Article

AN - SCOPUS:84861552722

VL - 85

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 20

M1 - 205431

ER -