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Anisotropic Aerogels for Studying Superfluid $^3$He | | J. Pollanen
; S. Blinstein
; H. Choi
; J.P. Davis
; T.M. Lippman
; L.B. Lurio
; W.P. Halperin
; | | Date: |
30 Jun 2006 | | Subject: | Superconductivity; Other | | Abstract: | It may be possible to stabilize new superfluid phases of $^{3}$He with anisotropic silica aerogels. We discuss two methods that introduce anisotropy in the aerogel on length scales relevant to superfluid $^{3}$He. First, anisotropy can be induced with uniaxial strain. A second method generates anisotropy during the growth and drying stages. We have grown cylindrical $sim$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 $sim90^circ$ out of phase relative to that induced by strain. This has implications for the possible stabilization of superfluid phases with specific symmetry. | | Source: | arXiv, cond-mat/0606784 | | Services: | Forum | Review | PDF | Favorites | |
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