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Superconducting tunneling study of vanadium

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
The tunneling spectroscopy of McMillan and Rowell is extended to vanadium, with the use of clean and highly ordered structures of the form M-Al/sub 2/O/sub 3/-Al/V. The Eliashberg function ..cap alpha../sup 2/F(E) is determined and leads to lambda = 0.82 +- 0.05 and ..mu..(/sub ph/ = 0.15 +- 0.03. These tunneling results, the first available for V, indicate a smaller influence of paramagnon spin fluctuations in suppressing superconductivity in vanadium than recently suggested, but do not rule out such effects at a level lambda/sub s/approx.0.1.
Research Organization:
Ames Laboratory-U.S. Department of Energy and Department of Physics, Iowa State University, Ames, Iowa 50011
DOE Contract Number:
W-7405-ENG-82
OSTI ID:
5533785
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 25:3; ISSN PRBMD
Country of Publication:
United States
Language:
English