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Effects of Lifshitz transitions in ferromagnetic superconductors: the case of URhGe

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journal contribution
posted on 12.09.2018 by Yury Sherkunov, Andrey Chubukov, Joseph Betouras
In ferromagnetic superconductors, like URhGe, superconductivity co-exists with magnetism near zero field, but then re-appears again in a finite field range, where the system also displays mass enhancement in the normal state. We present theoretical understanding of this non-monotonic behavior. We explore the multi-band nature of URhGe and associate re-entrant superconductivity and mass enhancement with the finite field Lifshitz transition in one of the bands. We found good agreement between our theory and a number of experimental results for URhGe, such as weakly first order reentrant transition, the dependence of superconducting $T_c$ on a magnetic field, and the field dependence of the effective mass, the specific heat and the resistivity in the normal state. Our theory can be applied to other ferromagnetic multi-band superconductors.

Funding

This work was supported by the EPSRC (YS and JJB) through the grant EP/P002811/1. and by the U.S. Department of Energy through the University of Minnesota Center for Quantum Materials, under award DE-SC-0016371 (A.V.C.).

History

School

  • Science

Department

  • Physics

Published in

Physical Review Letters

Volume

121

Citation

SHERKUNOV, Y., CHUBUKOV, A. and BETOURAS, J.J., 2018. Effects of Lifshitz transitions in ferromagnetic superconductors: the case of URhGe. Physical Review Letters, 121: 097001.

Publisher

© American Physical Society

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial 4.0 Unported (CC BY-NC 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc/4.0/

Acceptance date

02/08/2018

Publication date

2018

Notes

This paper was accepted for publication in the journal Physical Review Letters and the definitive published version is available at https://doi.org/10.1103/PhysRevLett.121.097001

ISSN

0031-9007

Language

en

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