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Superfluid 3He in squeezed nematic aerogel

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arxiv 1911.01193 v1 pith:4SXQYMNY submitted 2019-11-04 cond-mat.other

V. V. Dmitriev , M. S. Kutuzov , A. A. Soldatov , A. N.Yudin This is my paper · ORCID
classification cond-mat.other
keywords phasesamplesaerogelsqueezedsuperfluiddifferencenematicresults
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We present results of nuclear magnetic resonance (NMR) experiments in superfluid 3He in two samples of nematic aerogel consisting of nearly parallel mullite strands. The samples were cut from the same piece of the aerogel, but one of them was squeezed by 30% in the direction transverse to the strands. In both samples the superfluid transition of 3He occurred into the polar phase, where no qualitative difference between NMR properties of 3He in these samples was found. The difference, however, has appeared on further cooling, after the transition to the polar-distorted A phase (PdA phase) with the orbital part of the order parameter in the 2D Larkin-Imry-Ma (LIM) state. In the squeezed sample the 2D LIM state is anisotropic that results in changes in the NMR, which can be used as an additional marker of the PdA phase and have allowed us to measure the value of the anisotropy.

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  1. Impact of Strong Anisotropy on Phase Diagram of Superfluid $^3$He in Aerogels

    cond-mat.other 2019-08 conditional novelty 6.0 of 10

    For superfluid 3He in a model aerogel with finite uniaxial anisotropy, the polar-phase transition temperature stays nearly independent of impurity scattering, extending Anderson's theorem beyond the infinitely anisotr...

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