Anomalous Attenuation of Transverse Sound in 3He

Details Anomalous Attenuation of Transverse Sound in 3He Anomalous Attenuation of Transverse Sound in 3He

2008-07-14

arxiv.org/abs/0807.2221v2

Phys. Rev. Lett. 101, 085301 (2008)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures, accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.101.085301

We present the first measurements of the attenuation of transverse sound in superfluid 3He-B. We use fixed path length interferometry combined with the magneto-acoustic Faraday effect to vary the effective path length by a factor of two, resulting in absolute values of the attenuation. We find that attenuation is significantly larger than expected from the theoretical dispersion relation, in contrast to the phase velocity of transverse sound. We suggest that the anomalous attenuation can be explained by surface Andreev bound states.

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