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Hydrogen-induced transport properties of holes in diamond surface layers

  • C. E. Nebel
  • , C. Sauerer
  • , F. Ertl
  • , M. Stutzmann
  • , C. F.O. Graeff
  • , P. Bergonzo
  • , O. A. Williams
  • , R. Jackman
  • Walter Schottky Institut
  • University of São Paulo
  • CEA
  • University College London

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Three hydrogen-terminated diamonds with different surface roughness and morphologies have been investigated by conductivity and Hall experiments in the temperature regime 0.34-350 K. The sheet hole densities are weakly temperature dependent above a critical temperature Tc (20 K≤Tc≤70 K), below Tc carriers freeze out. The mobilities of holes show a minimum at Tc increasing towards higher and even stronger towards lower temperatures significantly up to 400 cm2/V s. A transport model is introduced where holes propagate in the valence band where a disorder-induced tail of localized states is present.

Original languageEnglish
Pages (from-to)4541-4543
Number of pages3
JournalApplied Physics Letters
Volume79
Issue number27
DOIs
StatePublished - 31 Dec 2001

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