Negative electron affinity effects on H plasma exposed diamond (100) surfaces

P. K. Baumann, Robert Nemanich

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

The effects of annealing and a H plasma exposure on natural type IIb diamond (100) were investigated by means of ultraviolet photoemission spectroscopy (UPS). The diamond (100) surface was found to exhibit a negative electron affinity (NEA) following a 900 °C anneal in ultrahigh vacuum. After a H plasma exposure the NEA peak in the UPS spectra had doubled in height. An anneal to 1100 °C resulted in the removal of the sharp NEA feature. A second H plasma treatment resulted in the reappearance of the NEA peak like after the first H plasma exposure. A 2 × 1 reconstructed low-energy electron diffraction (LEED) pattern was observed subsequent to the anneals as well as the H plasma treatments. The fact that a NEA can be induced or removed repeatedly by means of a H plasma exposure or a 1100 °C anneal respectively provides evidence to correlate the appearance of a NEA with the presence of a monohydride terminated surface.

Original languageEnglish (US)
Pages (from-to)802-805
Number of pages4
JournalDiamond and Related Materials
Volume4
Issue number5-6
DOIs
StatePublished - May 1 1995
Externally publishedYes

Fingerprint

negative electron affinity
Electron affinity
Diamond
Diamonds
diamonds
Plasmas
Photoelectron spectroscopy
Ultraviolet spectroscopy
photoelectric emission
Low energy electron diffraction
Ultrahigh vacuum
Diffraction patterns
spectroscopy
ultrahigh vacuum
diffraction patterns
electron diffraction
Annealing
annealing

Keywords

  • Diamond
  • Hydrogen
  • Substrate preparation
  • Surface characterization

ASJC Scopus subject areas

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

Cite this

Negative electron affinity effects on H plasma exposed diamond (100) surfaces. / Baumann, P. K.; Nemanich, Robert.

In: Diamond and Related Materials, Vol. 4, No. 5-6, 01.05.1995, p. 802-805.

Research output: Contribution to journalArticle

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