Ground-state phase diagram of the one-dimensional $t$-$J_s$-$J_{\tau }$ model at quarter filling

Yuya Kurebayashi, Hiroki Oshiyama, Naokazu Shibata

We study the ground state of the one-dimensional "$t$-$J_s$-$J_{\tau }$ model," which is a variant of the $t$-$J$ model with additional channel degree of freedom. The model is not only a…