Abstract

It is shown that the critical temperature for spin-triplet, p-wave superconductivity mediated by spin fluctuations is generically much higher in a Heisenberg ferromagnetic phase than in a paramagnetic one, due to the coupling of the magnons to the longitudinal magnetic susceptibility. Together with the tendency of the low-temperature ferromagnetic transition in very clean Heisenberg magnets to be of first order, this qualitatively explains the phase diagram recently observed in UGe2.

Department(s)

Physics

Keywords and Phrases

Approximation theory; Calculations; Carrier concentration; Elementary particles; Ferromagnetism; Green's function; Magnetic susceptibility; Magnetization; Mathematical models; Phase diagrams; Superconductivity, Bohr magneton; Electron number density; Heisenberg ferromagnetic phase; Hubbard model; Magnons; P-wave superconductivity, Superconducting transition temperature

International Standard Serial Number (ISSN)

0031-9007

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2001 American Physical Society (APS), All rights reserved.

Included in

Physics Commons

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