High-temperature metallization of the Ge(111) surface detected by photoemission spectroscopy

A. Santoni, V.R. Dhanak, A. Goldoni, M. Sancrotti, S. Modesti

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Abstract

The 3d core levels and the valence band of Ge(111) have been studied by photoemission as a function of temperature up to 1200 K. Evidence of a phase transition is found between 1020 K and 1085 K from core level analysis. For 1020 K < T < 1200 K the data can be interpreted consistently with an incomplete surface melting scenario. A finite density of states at the Fermi level indicates a metallic surface layer above this phase transition. About 0.7-1 atomic bilayer is estimated to undergo the semiconductor-to-metal transition.
Original languageEnglish
Pages (from-to)275 - 280
Number of pages6
JournalEurophysics Letters
Volume34
Issue number4
DOIs
Publication statusPublished - 1 May 1996
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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