Sound attenuation in the superconducting amorphous alloy ZrTiCuNiBe

Creators: Bezuglyi, E. V.; Gaiduk, A. L.; Fil, V. D.; Johnson, W. L.; Bruls, G.; Lüthi, B.; Wolf, B.; Zherlitsyn, S. V.

Abstract

The superconducting energy gap and the parameter eta determining the intensity of electron scattering at two-level systems in amorphous ZrTiCuNiBe are determined from the results of measurements of sound attenuation. The mechanism of adiabatic renormalization of the amplitude of coherent tunneling is used for a quantitative description of the peculiarities of sound absorption in the vicinity of Tc.

Additional Information

© 1999 American Institute of Physics. (Submitted May 25, 1999) Fiz. Nizk. Temp. 25, 1329–1333 (December 1999) The authors are obliged to Prof. G. Weiss for drawing their attention to the publications by Kagan and Prokof'ev [Ref. 4] and Stockburger et al [Ref. 7]. This research was partially supported by the State Foundation on Fundamental Research in Ukraine (grant No. 2.4/153) and by Deutsche Forschungsgemeinschaft via SFB 252. One of the authors (W.L.J.) wishes to thank the US Energy Department for grant (No. DE-FG03-86ER45242), while S.V.Zh. is grateful to the von Humboldt Foundation for financial support.

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