Characterization of hydrogen-terminated CVD diamond surfaces and their contact properties

H. Kawarada, M. Aoki, H. Sasaki, K. Tsugawa

Research output: Contribution to journalArticle

65 Citations (Scopus)

Abstract

Metal-diamond contact properties have been investigated on diamond (001) 2 × 1 surfaces. The 2 × 1 reconstruction has been examined by atomic-scale scanning tunnelling microscopy. From ab initio molecular orbital calculations, the stablest structure of the 2 × 1 unit is a monohydride carbon dimer. On the surfaces the highest quality Schottky diodes have been fabricated using metals with lower electronegativities. The Schottky barrier heights depend on the metal electronegativity. Moreover ohmic contacts have been obtained in metals with higher electronegativities. These results indicate that the surface states are effectively reduced by the 2 × 1 surface reconstruction.

Original languageEnglish
Pages (from-to)961-965
Number of pages5
JournalDiamond and Related Materials
Volume3
Issue number4-6
DOIs
Publication statusPublished - 1994 Apr

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

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