High-temperature photoemission spectroscopy of the Ge(110) surface and high-temperature surface order-disorder phase transitions

A. Santoni, A.D. Laine, L. Petaccia, V.R. Dhanak, M. Sancrotti, S. Modesti

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Abstract

The Ge(110) surface has been investigated by core-level and valence band (VB) photoemission spectroscopy as a function of temperature starting from the room temperature c(8×10) reconstructed surface up to 1196 K. Evidence of a phase transition is found at about 750 ± 50 K from core-level and valence band data analysis. VB photoemission shows that above 750 K the Ge(110) surface acquires increasing metallic character up to 1110 K, where a sudden, intense jump of the emission intensity at the Fermi level is observed. At higher temperatures up to 1196 K, a finite and constant density of states is observed, indicating the presence of a metallic surface layer. © 1999 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)423 - 427
Number of pages5
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume101-103
Publication statusPublished - 1999
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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