Effect of the hydrogen tunnelling states of the acoustic wave propagation in niobium at low temperatures

G. Bellessa

The variation of the sound velocity at 200 MHz has been measured down to 50 mK in single crystals of niobium doped with oxygen and hydrogen. An effect of the hydrogen tunnelling states on the sound velocity is reported. Some characteristic parameters of these states are then deduced.

Mots clés: acoustic wave propagation; acoustic wave velocity; hydrogen; lattice localised modes; lattice phonons; niobium; oxygen; tunnelling; H tunnelling states; O doped; H doped; Nb; phonons; low temperatures; sound velocity; 200 MHz; 50 mK; single crystals

Domaines: Articles anciens

G. Bellessa. Effect of the hydrogen tunnelling states of the acoustic wave propagation in niobium at low temperatures. Journal de Physique Lettres, 1983, 44 (10), pp.387-391. ⟨10.1051/jphyslet:019830044010038700⟩. ⟨jpa-00232207⟩