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2010•AIP conference proceedingsRequires access

Superconductivity in a correlated system of quasiparticles with spin-dependent masses

Jan Kaczmarczyk, J. Spałek, Adolfo Avella, Ferdinando Mancini

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Abstract

We discuss a paired state of quasiparticles with spin dependent masses (SDM), which were observed recently in the CeCoIn5 system (cf. Ref. [1]). In the same strongly‐correlated system the Fulde‐Ferrell‐Larkin‐Ovchinnikov (FFLO) phase appears. The spin‐dependent masses essentially extend the regime of applied field and temperatures in which FFLO phase is stable. We believe that the mechanism of the FFLO stabilization by the mass spin‐dependence is generic. Therefore, FFLO phases should be searched for in the same systems in which spin‐dependent masses were observed and vice versa. We compare results of our model calculations with the experiment.

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What this paper is about

We discuss a paired state of quasiparticles with spin dependent masses (SDM), which were observed recently in the CeCoIn5 system (cf. Ref. [1]). In the same strongly‐correlated system the Fulde‐Ferrell‐Larkin‐Ovchinnikov (FFLO) phase appears. The spin‐dependent masses essentially extend the regime of applied field and temperatures in which FFLO phase is stable. We believe that the mechanism of the FFLO stabilization by the mass spin‐dependence is generic. Therefore, FFLO phases should be searched for in the same systems in which spin‐dependent masses were observed and vice versa. We compare results of our model calculations with the experiment.

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Available abstract

We discuss a paired state of quasiparticles with spin dependent masses (SDM), which were observed recently in the CeCoIn5 system (cf. Ref. [1]). In the same strongly‐correlated system the Fulde‐Ferrell‐Larkin‐Ovchinnikov (FFLO) phase appears. The spin‐dependent masses essentially extend the regime of applied field and temperatures in which FFLO phase is stable. We believe that the mechanism of the FFLO stabilization by the mass spin‐dependence is generic. Therefore, FFLO phases should be searched for in the same systems in which spin‐dependent masses were observed and vice versa. We compare results of our model calculations with the experiment.

Key concepts: Quasiparticle, Condensed matter physics, Physics, Spin (aerodynamics), Superconductivity, Phase (matter), Field (mathematics), Quantum mechanics

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