Theoretical and Experimental Optical Spectroscopy Study of Hydrogen Adsorption at Si(111)-( 7×7)

C. Noguez, C. Beitia, W. Preyss, A. I. Shkrebtii, M. Roy, Y. Borensztein, and R. Del Sole
Phys. Rev. Lett. 76, 4923 – Published 24 June 1996
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Abstract

The combination of in situ real-time surface differential reflectivity (SDR) spectroscopy and microscopic calculations has been used for the first time to investigate gas adsorption on a Si surface. The optical signatures of some microscopic structural units of Si(111)-( 7×7) have been identified. The development of the corresponding features in the SDR spectra upon the amount of H exposure allowed us to demonstrate the occurrence of two different mechanisms in the hydrogenation and to determine their relative kinetics.

  • Received 2 November 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.4923

©1996 American Physical Society

Authors & Affiliations

C. Noguez1, C. Beitia2, W. Preyss2, A. I. Shkrebtii3, M. Roy2, Y. Borensztein2, and R. Del Sole3

  • 1Instituto de Fisíca, Universidad Nacional Autónoma de México, Apdo. Postal 20-364, 01000 México D.F., México and Department of Physics and Astronomy, and CMSS Program, Ohio University, Athens, Ohio 45701-2979
  • 2Laboratoire d'Optique des Solides, UA CNRS 781, Université Pierre et Marie Curie, Case 80, 4 place Jussieu, 75252 Paris Cedex 05, France
  • 3Instituto Nazionale di Fisica della Materia, Departimento di Fisica, II Universitá di Roma “Tor Vergata,” Via della Ricerca Scientifica 1, 00133 Rome, Italy

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Vol. 76, Iss. 26 — 24 June 1996

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