Sign structure of the $t$-$t^{\prime }$-$J$ model and its physical consequences

Xin Lu, Jia-Xin Zhang, Shou-Shu Gong +2

Understanding the doped Mott insulator is a central challenge in condensed matter physics. In this work, we first explicitly identify a new sign structure in the $t$-$t^{\prime }$-$J$ model…