A dilemma due to the experimental observation of a 'clean' unreconstructed elemental semiconductor surface without band gap states is resolved. Results from photon stimulated ion description, high resolution low energy electron loss spectroscopy and photoemission spectroscopy find that the conventionally polished diamond (111) 1 multiplied by 1 surface is atomically terminated and electronically stabilized by hydrogen. Thermal desorption of hydrogen upon heating results in a reconstructed 2 multiplied by 2/2 multiplied by 1 surface with filled electronic surface states in and near the fundamental gap. Exposure of the reconstructed surface to atomic hydrogen (or dueterium) is found to again terminate the surface and remove the near band gap surface states. Apparent inconsistencies in the understanding of the diamond: hydrogen interaction are resolved.
Diamond (111) surface: a dilemma resolved / B.B. Pate, B.J. Waclawski, P.M. Stefan, C. Binns, T. Ohta, M.H. Hecht, P.J. Jupiter, M.L. Shek, D.T. Pierce, N. Swanson, R.J. Celotta, G. Rossi, I. Lindau, W.E. Spicer. - In: PHYSICA. B + C. - ISSN 0378-4363. - 117-118:Pt 2(1982), pp. 783-785. ((Intervento presentato al 16. convegno Proc of the Int Conf on the Phys of Semicond tenutosi a Montpellier nel 1982.
Diamond (111) surface: a dilemma resolved
G. Rossi;
1982
Abstract
A dilemma due to the experimental observation of a 'clean' unreconstructed elemental semiconductor surface without band gap states is resolved. Results from photon stimulated ion description, high resolution low energy electron loss spectroscopy and photoemission spectroscopy find that the conventionally polished diamond (111) 1 multiplied by 1 surface is atomically terminated and electronically stabilized by hydrogen. Thermal desorption of hydrogen upon heating results in a reconstructed 2 multiplied by 2/2 multiplied by 1 surface with filled electronic surface states in and near the fundamental gap. Exposure of the reconstructed surface to atomic hydrogen (or dueterium) is found to again terminate the surface and remove the near band gap surface states. Apparent inconsistencies in the understanding of the diamond: hydrogen interaction are resolved.
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