Two-photon excitation processes and linewidths of surface and image states on Cu(111)

被引：42

作者：

Wallauer, W ^{[1
]}

Fauster, T ^{[1
]}

机构：

[1] UNIV MUNICH, SEKT PHYS, D-80799 MUNICH, GERMANY

来源：

SURFACE SCIENCE | 1997年 / 374卷 / 1-3期

关键词：

copper; low-index single crystal surfaces; surface electronic phenomena; two-photon photoelectron spectroscopy;

D O I：

10.1016/S0039-6028(96)01242-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The occupied surface state and the first image state on Cu(111) have been observed by high-resolution, two-photon photoemission as a function of photon energy. A pronounced narrowing of the linewidth is found for the resonant excitation from the occupied surface state into the first image state. The product of two Lorentzians convoluted with a Gaussian leads to a satisfactory description of the complete series of spectra. The intrinsic linewidth of the first image state on Cu(111) is obtained as 85 +/- 10 meV, in agreement with recent time-resolved measurements. The occupied surface state has an intrinsic linewidth of 65 +/- 15 meV, as also observed in one-photon photoemission experiments. (C) 1997 Elsevier Science B.V.

引用

页码：44 / 50

页数：7

共 25 条

[1] PHOTOEMISSION EXPERIMENTS ON COPPER [J].