The intrinsic linewidth of Ag(100) electronic image-potential states versus the momentum parallel to the surface has been obtained from line-shape analysis of high-resolution angle-resolved two-photon photoemission spectra. For the n=1 state, the measured intrinsic linewidths have been observed to increase from 14 meV at normal emission (k(parallel to)=0) to 70 meV at k(parallel to)=0.18 Angstrom(-1). This finding, when compared to the significantly lower inverse lifetime broadening measured on Cu(100), opens the question of the interplay between collective particle effects and nonlocal mechanisms associated with the image-potential electrons decay dynamics. In addition, the effective electron masses for the n=1 and n=2 states, observed in our experiments along the (&UGamma;) over bar(M) over bar and (&UGamma;) over bar(X) over bar directions of the surface Brillouin zone, improve the agreement between the measured values and the theoretical predictions.

Ferrini, G., Giannetti, C., Fausti, D., Galimberti, G., Peloi, M., Banfi, G., Parmigiani, F., Effective mass and momentum-resolved intrinsic linewidth of image-potential states on Ag(100), <<PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS>>, 2003; 67 (23): N/A-N/A. [doi:10.1103/PhysRevB.67.235407] [http://hdl.handle.net/10807/35831]

Effective mass and momentum-resolved intrinsic linewidth of image-potential states on Ag(100)

Ferrini, Gabriele;Giannetti, Claudio;Fausti, Daniele;Galimberti, Gianluca;Peloi, Marco;Parmigiani, Fulvio
2003

Abstract

The intrinsic linewidth of Ag(100) electronic image-potential states versus the momentum parallel to the surface has been obtained from line-shape analysis of high-resolution angle-resolved two-photon photoemission spectra. For the n=1 state, the measured intrinsic linewidths have been observed to increase from 14 meV at normal emission (k(parallel to)=0) to 70 meV at k(parallel to)=0.18 Angstrom(-1). This finding, when compared to the significantly lower inverse lifetime broadening measured on Cu(100), opens the question of the interplay between collective particle effects and nonlocal mechanisms associated with the image-potential electrons decay dynamics. In addition, the effective electron masses for the n=1 and n=2 states, observed in our experiments along the (&UGamma;) over bar(M) over bar and (&UGamma;) over bar(X) over bar directions of the surface Brillouin zone, improve the agreement between the measured values and the theoretical predictions.
Inglese
Ferrini, G., Giannetti, C., Fausti, D., Galimberti, G., Peloi, M., Banfi, G., Parmigiani, F., Effective mass and momentum-resolved intrinsic linewidth of image-potential states on Ag(100), <<PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS>>, 2003; 67 (23): N/A-N/A. [doi:10.1103/PhysRevB.67.235407] [http://hdl.handle.net/10807/35831]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10807/35831
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 12
  • ???jsp.display-item.citation.isi??? 11
social impact