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Transverse Acoustic Spectroscopy of Superfluid 3He in Compressed Aerogel

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Abstract

The unique nanoporous structure of aerogel provides a rare opportunity to study the role of anisotropic disorder on an anisotropic superfluid 3He. It has been proposed that uniaxial deformation of compliant aerogel would induce global anisotropy and a few compelling effects of global anisotropy on nature of the superfluid phases have been predicted. We measured high frequency shear acoustic impedance in superfluid 3He at 32 bar in a commercially available 98% porosity aerogel under uniaxial compression. At 5% compression, we found evidence of an A-like phase stabilized in a wider temperature width than the A-like phase in uncompressed aerogel.

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Authors and Affiliations

  1. Department of Physics, University of Florida, Gainesville, FL, 32611-8440, USA

    P. Bhupathi, B. H. Moon, M. Gonzalez & Y. Lee

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  1. P. Bhupathi
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  2. B. H. Moon
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  3. M. Gonzalez
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  4. Y. Lee
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Correspondence to Y. Lee.

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Bhupathi, P., Moon, B.H., Gonzalez, M. et al. Transverse Acoustic Spectroscopy of Superfluid 3He in Compressed Aerogel. J Low Temp Phys 158, 176–181 (2010). https://doi.org/10.1007/s10909-009-9938-3

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  • DOI: https://doi.org/10.1007/s10909-009-9938-3

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