Strong Enhancement of Superconducting T_c in Ferromagnetic Phases

Author

Theodore R. Kirkpatrick
Dietrich Belitz
Thomas Vojta, Missouri University of Science and TechnologyFollow
Rajesh S. Narayanan

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.

Recommended Citation

T. R. Kirkpatrick et al., "Strong Enhancement of Superconducting T_c in Ferromagnetic Phases," Physical Review Letters, vol. 87, no. 12, pp. 127003/1 - 127003/4, American Physical Society (APS), Sep 2001.

The definitive version is available at https://doi.org/10.1103/PhysRevLett.87.127003

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.

Publication Date

01 Sep 2001