Abstract
Spin waves in the A phase of superfluid3He are studied theoretically. It is assumed that the condensate in the A phase consists of theP-wave triplet pairs of the type suggested by Anderson and Brinkman. We show that the spin wave mode with a finite energy gap exists throughout the A phase. In particular atT=0 K the dispersion of the spin wave is given by, forvq<Δ,
where θ is the spin wave energy, ω T =[ω 20 +2(1−Ī)AΔ2]1/2 is the nuclear magnetic resonance energy,v is the Fermi velocity,q is the wave vector of the spin wave, andĪ=IN(0)=−1/4Z 0 is the Landau-Fermi liquid parameter.
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On leave of absence from Department of Applied Science, Tohoku University, Sendai, Japan.
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Maki, K., Ebisawa, H. Spin waves in anisotropic superfluid3He. J Low Temp Phys 15, 213–229 (1974). https://doi.org/10.1007/BF00661183
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DOI: https://doi.org/10.1007/BF00661183