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Surface-state linewidth from scanning tunnelling spectroscopy

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Abstract.

The STM can be used to investigate lifetimes of hot holes in a surface state at low temperatures. We analysed dI/dV data from Ag(111) using detailed tunnelling calculations and a simple model and found an electron self-energy of Σ=4.9±0.6 meV. The corresponding lifetime τ= 67±8 fs is considerably higher than those determined by angle-resolved photoemission, although it remains below theoretical predictions. Spatially resolved dI/dV spectra reveal that the lifetime decreases drastically in proximity to defects such as surface steps.

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Authors and Affiliations

  1. 2. Physikalisches Institut, RWTH Aachen, D-52056 Aachen, Germany (E-mail: richard.berndt@physik.rwth-aachen.de), , , , , , DE

    R. Berndt

  2. Institut de la Matière Condensée, Université de Lausanne, CH-1015 Lausanne, Switzerland, , , , , , CH

    J. Li & W.D. Schneider

  3. Department of Physics, University of Bath, BA2 7AY, United Kingdom, , , , , , UK

    S. Crampin

Authors
  1. R. Berndt
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  2. J. Li
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  3. W.D. Schneider
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  4. S. Crampin
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Received: 22 March 1999 / Accepted: 25 June 1999 / Published online: 16 September 1999

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Berndt, R., Li, J., Schneider, W. et al. Surface-state linewidth from scanning tunnelling spectroscopy. Appl Phys A 69, 503–506 (1999). https://doi.org/10.1007/s003390051453

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  • DOI: https://doi.org/10.1007/s003390051453

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