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Nodal quasi-particles and coexisting orders in striped superconductors

M. Granath·V. Oganesyan·S. A. Kivelson·E. Fradkin·V. J. Emery
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Abstract

We study the properties of a quasi-one dimensional superconductor which consists of an alternating array of two inequivalent chains. This model is a simple charicature of a locally striped high temperature superconductor, and is more generally a theoretically controllable system in which the superconducting state emerges from a non-Fermi liquid normal state. Even in this limit, ``d-wave like'' order parameter symmetry is natural, but the superconducting state can either have a complete gap in the quasi-particle spectrum, or gapless ``nodal'' quasiparticles. We also find circumstances in which antiferromagnetic order (typically incommensurate) coexists with superconductivity.

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M. Granath, V. Oganesyan, S. A. Kivelson, E. Fradkin, V. J. Emery. 2001-10-11. Nodal quasi-particles and coexisting orders in striped superconductors. https://doi.org/10.1103/physrevlett.87.167011

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