Anisotropic aerogels for studying superfluid 3He

J. Pollanen; S. Blinstein; H. Choi; J. P. Davis; T. M. Lippman; L. B. Lurio; W. P. Halperin

doi:10.1007/s10909-007-9449-z

Anisotropic aerogels for studying superfluid ³He

J. Pollanen^*, S. Blinstein, H. Choi, J. P. Davis, T. M. Lippman, L. B. Lurio, W. P. Halperin

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

It may be possible to stabilize new superfluid phases of ³He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid ³He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical ∼98% aerogels with anisotropy indicated by preferential radial shrinkage after supercritical drying and find that this shrinkage correlates with small angle x-ray scattering (SAXS). The growth-induced anisotropy was found to be ∼90° out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry.

Original language	English (US)
Pages (from-to)	579-583
Number of pages	5
Journal	Journal of Low Temperature Physics
Volume	148
Issue number	5-6
DOIs	https://doi.org/10.1007/s10909-007-9449-z
State	Published - Sep 2007

Funding

Acknowledgements We would like to thank J.A. Sauls for valuable theoretical insights. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38. We also acknowledge the support of the National Science Foundation, DMR-0244099.

Keywords

61.10.Eq
67.57.-z
67.57.Pq

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Condensed Matter Physics

Access to Document

10.1007/s10909-007-9449-z

Cite this

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title = "Anisotropic aerogels for studying superfluid 3He",

abstract = "It may be possible to stabilize new superfluid phases of 3He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid 3He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical ∼98% aerogels with anisotropy indicated by preferential radial shrinkage after supercritical drying and find that this shrinkage correlates with small angle x-ray scattering (SAXS). The growth-induced anisotropy was found to be ∼90° out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry.",

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author = "J. Pollanen and S. Blinstein and H. Choi and Davis, {J. P.} and Lippman, {T. M.} and Lurio, {L. B.} and Halperin, {W. P.}",

note = "Funding Information: Acknowledgements We would like to thank J.A. Sauls for valuable theoretical insights. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38. We also acknowledge the support of the National Science Foundation, DMR-0244099.",

year = "2007",

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T1 - Anisotropic aerogels for studying superfluid 3He

AU - Pollanen, J.

AU - Blinstein, S.

AU - Choi, H.

AU - Davis, J. P.

AU - Lippman, T. M.

AU - Lurio, L. B.

AU - Halperin, W. P.

N1 - Funding Information: Acknowledgements We would like to thank J.A. Sauls for valuable theoretical insights. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. W-31-109-ENG-38. We also acknowledge the support of the National Science Foundation, DMR-0244099.

PY - 2007/9

Y1 - 2007/9

N2 - It may be possible to stabilize new superfluid phases of 3He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid 3He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical ∼98% aerogels with anisotropy indicated by preferential radial shrinkage after supercritical drying and find that this shrinkage correlates with small angle x-ray scattering (SAXS). The growth-induced anisotropy was found to be ∼90° out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry.

AB - It may be possible to stabilize new superfluid phases of 3He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid 3He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical ∼98% aerogels with anisotropy indicated by preferential radial shrinkage after supercritical drying and find that this shrinkage correlates with small angle x-ray scattering (SAXS). The growth-induced anisotropy was found to be ∼90° out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry.

KW - 61.10.Eq

KW - 67.57.-z

KW - 67.57.Pq

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