With cuprate superconductors in mind, we check whether the d-wave superconducting (dSC) state coexists with or excludes the staggered flux (SF) state, which was revealed to be a strong candidate for the pseudogap state. To this end, we use a variational Monte Carlo method for the square-lattice t-J model with diagonal transfer t′. We construct a trial wave function which can simultaneously represent dSC and SF orders for a continuous description of their interplay. Furthermore, a band renormalization effect is introduced into both orders independently. It is found that the SF state does not coexist with dSC and is unstable for a wide area in the parameter space. However, a strange state having both SF and antiferromagnetic orders is found to be stable for very low doping rate.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2018 Jul 26|
|Event||30th International Symposium on Superconductivity, ISS 2017 - Tokyo, Japan|
Duration: 2017 Dec 13 → 2017 Dec 15