Nodal quasiparticles in stripe ordered superconductors.
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 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 limit, " d-wave-like" order parameter symmetry is natural, but the superconducting state can either have a complete gap in the quasiparticle spectrum, or gapless "nodal" quasiparticles. We also find circumstances in which antiferromagnetic order (typically incommensurate) coexists with superconductivity.
Granath
M
M
Department of Physics, UCLA, Los Angeles, California 90095, USA.
Oganesyan
V
V
Kivelson
S A
SA
Fradkin
E
E
Emery
V J
VJ