Magneto-acoustic rotation of transverse waves in 3He-B

Details Magneto-acoustic rotation of transverse waves in 3He-B Magneto-acoustic rotation of transverse waves in 3He-B

1999-10-18

arxiv.org/abs/cond-mat/9910262v1

Physics

Condensed Matter

Superconductivity

Submitted to Physica B (Proc. LT22), 2 pages with 1 figure

Scientific paper

10.1016/S0921-4526(99)02532-6

In superfluid 3He-B the off-resonant coupling of the J=2-, M=+/- 1 order parameter collective modes to transverse current excitations stabilizes propagating transverse waves with low damping for frequencies above that of the J=2- modes. Right- (RCP) and left circularly polarized (LCP) transverse modes are degenerate in zero field; however, a magnetic field with H || q lifts this degeneracy giving rise to the acoustic analog of circular birefringence and an acoustic Faraday effect for linearly polarized transverse sound waves. We present theoretical results for the temperature, pressure and field dependence of the Faraday rotation angle, and compare the theory with recent measurements. The analysis provides a direct measurement of the Lande' g-factor for the J=2- modes, and new information on the magnitude of f-wave pairing correlations in 3He-B.

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