Compound formation and superconductivity in Au-Si: X-ray absorption measurements on ion-beam-mixed Au-Si films

Y. Jeon, N. Jisrawi, G. Liang, F. Lu, M. Croft, W. L. McLean, D. L. Hart, N. G. Stoffel, J. Z. Sun, T. H. Geballe

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18 Scopus citations

Abstract

Multilayered Au-Si thin films have been deposited with the net compositions Au1-xSix, x=0.29, 0.5, and 0.8. After ion-beam mixing these films exhibited superconductivity in the 0.31.2 K range despite the nonsuperconducting character of both Au and Si. Near-edge x-ray absorption spectroscopy (XAS) measurements on the Au L3 edge in these films indicate that metastable Au-Si compound formation occurs in these ion-mixed materials. Specifically, the XAS measurements indicate changes in Au 5d-orbital occupancy and changes in the local Au structural environment which are both consistent with local compound formation.

Original languageEnglish (US)
Pages (from-to)5748-5753
Number of pages6
JournalPhysical Review B
Volume39
Issue number9
DOIs
StatePublished - 1989

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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