Spin susceptibility of the superfluid $^{3}$He-B in aerogel

Details Spin susceptibility of the superfluid $^{3}$He-B in aerogel Spin susceptibility of the superfluid $^{3}$He-B in aerogel

2001-07-30

arxiv.org/abs/cond-mat/0107598v2

Phys. Rev. B 65, 024501 (2002)

Physics

Condensed Matter

10 pages, 4 figures, REVTeX

Scientific paper

10.1103/PhysRevB.65.024501

The temperature dependence of paramagnetic susceptibility of the superfluid ^{3}He-B in aerogel is found. Calculations have been performed for an arbitrary phase shift of s-wave scattering in the framework of BCS weak coupling theory and the simplest model of aerogel as an aggregate of homogeneously distributed ordinary impurities. Both limiting cases of the Born and unitary scattering can be easily obtained from the general result. The existence of gapless superfluidity starting at the critical impurity concentration depending on the value of the scattering phase has been demonstrated. While larger than in the bulk liquid the calculated susceptibility of the B-phase in aerogel proves to be conspicuously smaller than that determined experimentally in the high pressure region.

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