PRL_URhGe_15.pdf (492.74 kB)
Effects of Lifshitz transitions in ferromagnetic superconductors: the case of URhGe
journal contribution
posted on 2018-09-12, 10:55 authored by Yury Sherkunov, Andrey Chubukov, Joseph BetourasJoseph BetourasIn 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 LettersVolume
121Issue
9Citation
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 SocietyVersion
- 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
2018-08-02Publication date
2018-08-31Notes
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.121.097001ISSN
0031-9007Publisher version
Language
- en