Coexistence of itinerant ferromagnetism and a non-unitary superconducting state with line nodes: possible application to UGe$ 2$ - Condensed Matter > SuperconductivityReportar como inadecuado




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Abstract: We construct a mean-field theory for itinerant ferromagnetism coexisting witha non-unitary superconducting state, where only the majority-spin band isgapped and contains line nodes, while the minority-spin band is gapless at theFermi level. Our study is motivated by recent experimental results indicatingthat this may be the physical situation realized in the heavy-fermion compoundUGe$ 2$. We investigate the stability of the mean-field solution of themagnetic and superconducting order parameters. Also, we provide theoreticalpredictions for experimentally measurable properties of such a non-unitarysuperconductor: the specific heat capacity, the Knight shift, and the tunnelingconductance spectra. Our study should be useful for direct comparison withexperimental results and also for further predictions of the physics that maybe expected in ferromagnetic superconductors.



Autor: Jacob Linder, Iver B. Sperstad, Andriy Nevidomskyy, Mario Cuoco, Asle Sudbø

Fuente: https://arxiv.org/







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