4 papers
Monte Carlo study of the superfluid weight in doped antiferromagnets
Gregory C. Psaltakis
The phase fluctuations of the condensate in doped antiferromagnets, described by a t-t'-J model and a suitable 1/N expansion, provide a mechanism for a Kosterlitz-Thouless (KT) typ…
High-temperature superconductivity in doped antiferromagnets
Gregory C. Psaltakis
In the context of an effective model for doped antiferromagnets, whereby the charge carriers are treated as hard-core bosons, we demonstrate that the ground state energy close to h…
Flux quantization and superfluid weight in doped antiferromagnets
Gregory C. Psaltakis
Doped antiferromagnets, described by a t-t'-J model and a suitable 1/N expansion, exhibit a metallic phase-modulated antiferromagnetic ground state close to half-filling. Here we d…
Drude weight and total optical weight in a t-t'-J model
Gregory C. Psaltakis
We study the Drude weight D and the total optical weight K for a t-t'-J model on a square lattice that exhibits a metallic phase-modulated antiferromagnetic ground state close to h…