Nodal quasiparticles in stripe ordered superconductors - art. no. 167011

We study the properties of a quasi-one-dimensional superconductor which con sists of an alternating array of two inequivalent chains. This model is a s imple caricature of a 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 lit-nit, " d-wave-like" order parameter symmetry is natural, but the superconducting s tate can either have a complete gap in the quasiparticle spectrum, or gaple ss "nodal" quasiparticles. We also find circumstances in which antiferromag netic order (typically incommensurate) coexists with superconductivity.