Ultrathin deposition of copper on room temperature SrTiO3(100)

Jens E.T. Andersen, Preben J. Møller

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

An SrTiO3(110) surface was prepared and characterized under ultraclean conditions in ultrahigh vacuum. The methods used were Auger electron spectroscopy, electron energy loss spectroscopy, UV photoelectron spectroscopy and high resolution electron energy loss spectroscopy and low energy electron diffraction. Copper was gradually deposited at room temperature by electron beam evaporation upon a (1 × 1) SrTiO3(110) surface, until several monolayers were reached. Although charging effects disturb the Auger measurements, it is possible to determine that the room temperature growth mode is of the Volmer-Weber type (islanding) and non-epitaxial. Five well-defined energy losses are attributed to interband transitions and plasmons in the range below 30 eV, while the UV photoelectron spectra showed three strong peaks characteristic of Cu 3d and O 2p bands, with copper appearing as an impurity in the band gap. It is suggested that the formation of islands is associated with TiO2-terminated layers at the surface. The copper is weakly bound to the substrate and desorbs at 500°C.

Original languageEnglish
Pages (from-to)137-146
Number of pages10
JournalThin Solid Films
Volume186
Issue number1
DOIs
Publication statusPublished - Jan 1 1990

Fingerprint

Copper
energy dissipation
Electron energy loss spectroscopy
copper
room temperature
electron energy
Plasmons
Low energy electron diffraction
Ultrahigh vacuum
Growth temperature
Auger electron spectroscopy
Photoelectron spectroscopy
Electron transitions
Photoelectrons
Ultraviolet spectroscopy
plasmons
Temperature
spectroscopy
ultrahigh vacuum
Auger spectroscopy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Andersen, Jens E.T. ; Møller, Preben J. / Ultrathin deposition of copper on room temperature SrTiO3(100). In: Thin Solid Films. 1990 ; Vol. 186, No. 1. pp. 137-146.
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Ultrathin deposition of copper on room temperature SrTiO3(100). / Andersen, Jens E.T.; Møller, Preben J.

In: Thin Solid Films, Vol. 186, No. 1, 01.01.1990, p. 137-146.

Research output: Contribution to journalArticle

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AU - Andersen, Jens E.T.

AU - Møller, Preben J.

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N2 - An SrTiO3(110) surface was prepared and characterized under ultraclean conditions in ultrahigh vacuum. The methods used were Auger electron spectroscopy, electron energy loss spectroscopy, UV photoelectron spectroscopy and high resolution electron energy loss spectroscopy and low energy electron diffraction. Copper was gradually deposited at room temperature by electron beam evaporation upon a (1 × 1) SrTiO3(110) surface, until several monolayers were reached. Although charging effects disturb the Auger measurements, it is possible to determine that the room temperature growth mode is of the Volmer-Weber type (islanding) and non-epitaxial. Five well-defined energy losses are attributed to interband transitions and plasmons in the range below 30 eV, while the UV photoelectron spectra showed three strong peaks characteristic of Cu 3d and O 2p bands, with copper appearing as an impurity in the band gap. It is suggested that the formation of islands is associated with TiO2-terminated layers at the surface. The copper is weakly bound to the substrate and desorbs at 500°C.

AB - An SrTiO3(110) surface was prepared and characterized under ultraclean conditions in ultrahigh vacuum. The methods used were Auger electron spectroscopy, electron energy loss spectroscopy, UV photoelectron spectroscopy and high resolution electron energy loss spectroscopy and low energy electron diffraction. Copper was gradually deposited at room temperature by electron beam evaporation upon a (1 × 1) SrTiO3(110) surface, until several monolayers were reached. Although charging effects disturb the Auger measurements, it is possible to determine that the room temperature growth mode is of the Volmer-Weber type (islanding) and non-epitaxial. Five well-defined energy losses are attributed to interband transitions and plasmons in the range below 30 eV, while the UV photoelectron spectra showed three strong peaks characteristic of Cu 3d and O 2p bands, with copper appearing as an impurity in the band gap. It is suggested that the formation of islands is associated with TiO2-terminated layers at the surface. The copper is weakly bound to the substrate and desorbs at 500°C.

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