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It is well known that unconventional superconductors are very
sensitive to disorder (Larkin 1965) whereas a conventional s-wave
superconductor is protected from disorder by Anderson's theorem. In
the absence of phase-sensitive methods this disorder dependence has
been used as an indicator of unconventional pairing. There has been
much interest lately in Pomeranchuk instabilities as possible
candidates for novel order seen in a variety of non-superconducting
metals. In this talk, I exploit the analogy between an unconventional
superconductor and a Pomeranchuk instability of the metallic state to
show that such an instability has a quantitatively similar disorder
dependence to an unconventional superconductor.
> (Work done in collaboration with A. F. Ho, Royal Holloway, London). |
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