Synthesis and photoemission study of as-grown superconducting MgB2 thin films

K. Ueda*, H. Yamamoto, M. Naito

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


As-grown superconducting thin films of MgB2 were prepared by molecular beam epitaxy (MBE), and studied by X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS). Only films prepared at temperatures between 150 and 320 °C showed superconductivity. The best Tconset of 36 K was obtained with a sharp transition width of ∼ 1 K although the film crystallinity was poor. The in situ photoelectron spectra obtained on the surfaces of the MBE grown MgB2 films were free from dirt peaks. The XP spectra revealed the binding energy of the Mg 2p levels in MgB2 is close to that of metallic Mg and the binding energy of B 1s is close to that of transition-metal diborides. The valence UP spectra showed a clear Fermi edge although the density of states at EF is low and the major components of the valence band are located between 5 and 11 eV.

Original languageEnglish
Pages (from-to)225-228
Number of pages4
JournalPhysica C: Superconductivity and its applications
Issue numberPART 1
Publication statusPublished - 2002 Oct 1
Externally publishedYes


  • As-grown superconducting thin films
  • MBE
  • MgB
  • Photoemission
  • UPS
  • XPS

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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