Ultrasonic attenuation in superconducting Nb20Zr80 |
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| Authors: | Neil Thomas W. Arnold G. Weiss H.v. Löhneysen |
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| Affiliation: | Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, D-7000 Stuttgart 80, FRG;2. Physikalisches Institut der RWTH Aachen, Templergraben 55, D-5100 Aachen, FRG |
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| Abstract: | We have measured the low-temperature ultrasonic attenuation in quenched polycrystalline Nb20Zr80 at 30 and 90 MHz. The quenching process creates tunnelling states due to metastable regions of the athermal ω-phase. Our results can be explained on the basis of the interaction between electrons and tunnelling states. |
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