Lifetimes of Stark-shifted image states

Details Lifetimes of Stark-shifted image states Lifetimes of Stark-shifted image states

2005-04-15

arxiv.org/abs/cond-mat/0504388v1

Physics

Condensed Matter

Materials Science

10 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.95.046801

The inelastic lifetimes of electrons in image-potential states at Cu(100) that are Stark-shifted by the electrostatic tip-sample interaction in the scanning tunneling microscope are calculated using the many-body GW approximation. The results demonstrate that in typical tunneling conditions the image state lifetimes are significantly reduced from their field-free values. The Stark-shift to higher energies increases the number of inelastic scattering channels that are available for decay, with field-induced changes in the image state wave function increasing the efficiency of the inelastic scattering through greater overlap with final state wave functions.

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