Chiral d+is superconducting state in the two dimensional t-t' Hubbard model
arXiv:cond-mat/0309183 · doi:10.1103/PhysRevB.69.104501
Abstract
Applying the recently developed variational approach to Kohn-Luttinger superconductivity to the t-t' Hubbard model in two dimensions, we have found, for sizeable next-nearest neighbor hopping, an electron density controlled quantum phase transition between a d-wave superconducting state close to half filling and an s-wave superconductor at lower electron density. The transition occurs via an intermediate time reversal breaking d+is superconducting phase, which is characterized by nonvanishing chirality and density-current correlation. Our results suggest the possibility of a bulk time reversal symmetry breaking state in overdoped cuprates.
References in corpus (5)
- Angle-resolved photoemission spectroscopy of the cuprate superconductors
- Theory of Superconductivity in Strongly Correlated Electron Systems
- A chiral spin liquid wave function and the Lieb-Schulz-Mattis theorem
- Kohn-Luttinger instability of the t-t' Hubbard model in two dimensions: variational approach
- Broken Time Reversal Symmetry and Superconducting States in the Cuprates