Abstract
It is proved that in the polar phase of superfluid 3He stabilized by a nematic aerogel the temperature dependence of the gap in the spectrum of Fermi excitations must be the same as that in the bulk polar phase without foreign impurities when the liquid quasiparticles are specularly reflected from the aerogel strands. The analogy with the Anderson theorem for conventional superconductors is discussed.
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ACKNOWLEDGMENTS
I am grateful to G.E. Volovik who drew my attention to the papers [17–19] and to V.V. Dmitriev for his useful remarks.
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This article was prepared for the special issue dedicated to the centenary of A.S. Borovik-Romanov.
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Translated by V. Astakhov
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Fomin, I.A. Temperature Dependence of the Order Parameter of the Polar Phase of Liquid 3He in a Nematic Aerogel. J. Exp. Theor. Phys. 131, 29–33 (2020). https://doi.org/10.1134/S1063776120070055
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DOI: https://doi.org/10.1134/S1063776120070055