Quantum Coherence of Image-Potential States

Details Quantum Coherence of Image-Potential States Quantum Coherence of Image-Potential States

2003-05-05

arxiv.org/abs/cond-mat/0305083v2

Phys. Rev. Lett. 91, 106802 (2003)

Physics

Condensed Matter

Strongly Correlated Electrons

Submitted to Phys. Rev. Lett., 4 pages, 4 figures; corrected typos, minor changes

Scientific paper

10.1103/PhysRevLett.91.106802

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.

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