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- W145289623 abstract "Hydrogen interstitials in niobium, trapped by additional impurities such as nitrogen or oxygen, form tunneling systems with energy splittings E ≈ 2 K. This has been demonstrated by low-temperature specific heat measurements /1,2,3/, by inelastic neutron scattering experiments /4,5/, and also by sound velocity measurements /6/. Additionally, hydrogen tunneling systems give rise to relaxation processes resulting in a peak of the ultrasonic attenuation at 3K if the niobium host is in the superconducting state /7,8,9/. By suppressing superconductivity with a magnetic field this attenuation peak vanishes, proving that the dynamics of the tunneling systems are governed by their interaction with conduction electrons /8,9/. Recently this important role of the conduction electrons has also been verified in inelastic neutron scattering experiments /5/.KeywordsConduction ElectronSound VelocitySuperconducting StateInelastic NeutronUltrasonic AttenuationThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves." @default.
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- W145289623 date "1987-01-01" @default.
- W145289623 modified "2023-09-24" @default.
- W145289623 title "Sound Velocity Measurements on Hydrogen-Doped Niobium in the Superconducting and Normal States" @default.
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- W145289623 doi "https://doi.org/10.1007/978-3-642-71914-1_28" @default.
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