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Title:
Quantum fluctuation driven first-order phase transition in weak ferromagnetic metals
Authors:
Jackiewicz, J.; Bedell, K. S.
Publication:
Philosophical Magazine, 85, 1755-1763
Publication Date:
06/2005
Origin:
AUTHOR
Keywords:
Ferromagnetism, metals, Fermi liquid theory, phase transition
DOI:
10.1080/14786430500040720
Bibliographic Code:
2005PMag...85.1755J

Abstract

In a local Fermi liquid (LFL), we show that there is a line of weak first-order phase transitions between the ferromagnetic and paramagnetic phases due to purely quantum fluctuations. We predict that an instability towards superconductivity is only possible in the ferromagnetic state. At T ?=?0 we find a point on the phase diagram where all three phases meet and we call this a quantum triple point (QTP). A simple application of the Gibbs phase rule shows that only these three phases can meet at the QTP. This provides a natural explanation of the absence of superconductivity at this point coming from the paramagnetic side of the phase diagram, as observed in the recently discovered ferromagnetic superconductor, UGe2.
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