Quantum Coherence of Image-Potential States
Strongly Correlated Electrons
2009-11-10 v2
Abstract
The quantum dynamics of the two-dimensional image-potential states in front of the Cu(100) surface is measured by scanning tunneling microscopy (STM) and spectroscopy (STS). The dispersion relation and the momentum resolved phase-relaxation time of the first image-potential state are determined from the quantum interference patterns in the local density of states (LDOS) at step edges. It is demonstrated that the tip-induced Stark shift does not affect the motion of the electrons parallel to the surface.
Cite
@article{arxiv.cond-mat/0305083,
title = {Quantum Coherence of Image-Potential States},
author = {P. Wahl and M. A. Schneider and L. Diekhöner and R. Vogelgesang and K. Kern},
journal= {arXiv preprint arXiv:cond-mat/0305083},
year = {2009}
}
Comments
Submitted to Phys. Rev. Lett., 4 pages, 4 figures; corrected typos, minor changes