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J. Phys. Soc. Jpn. 77 (2008) 111002 (14 pages)  |Previous Article| |Next Article|  |Table of Contents|
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New Frontiers of Quantum Fluids and Solids

Impurity Effects of Aerogel in Superfluid 3He

William P. Halperin, Hyoungsoon Choi, John P. Davis, and Johannes Pollanen

Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208, U.S.A.

(Received June 27, 2008; Accepted July 25, 2008; Published November 10, 2008)

The discovery of superfluid 3He in high porosity silica aerogels, and subsequent experimental and theoretical work, have led to a better general understanding of quasiparticle scattering from impurities in unconventional pairing systems. It is immensely helpful for understanding impurity effects in the case of superfluid 3He that the structure of its order parameter is well-established. An overview of impurity effects is presented with emphasis on those experiments which have a quantitative interpretation in terms of theoretical models for homogeneous and inhomogeneous scattering. The latter can account successfully for most experimental results. ©2008 The Physical Society of Japan

KEYWORDS: superfluid, impurity, unconventional pairing, 3He, aerogel
URL: http://jpsj.ipap.jp/link?JPSJ/77/111002/
DOI: 10.1143/JPSJ.77.111002


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