Phys. Rev. Lett. 91, 106802 (2003) [4 pages]Quantum Coherence of Image-Potential StatesReceived 6 May 2003; published 5 September 2003 The quantum dynamics of the two-dimensional image-potential states in front of the Cu(100) surface is measured by scanning tunneling microscopy and spectroscopy. 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 at step edges. It is demonstrated that the tip-induced Stark shift does not affect the motion of the electrons parallel to the surface. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.106802
DOI:
10.1103/PhysRevLett.91.106802
PACS:
73.20.At, 68.37.Ef, 72.10.Fk, 72.15.Lh
See AlsoReply: P. Wahl, M. A. Schneider, L. Diekhöner, R. Vogelgesang, and K. Kern, Wahl et al. Reply:, Phys. Rev. Lett. 95, 029702 (2005). Reply: S. Crampin, J. Kröger, H. Jensen, and R. Berndt, Phase Coherence Length and Quantum Interference Patterns at Step Edges, Phys. Rev. Lett. 95, 029701 (2005). |
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