论文标题
一维$ t $ - $ j_s $ - $j_τ$型号的地面相图
Ground-state phase diagram of the one-dimensional $t$-$J_s$-$J_τ$ model at quarter filling
论文作者
论文摘要
我们研究了一维“ $ t $ - $ j_s $ - $j_τ$型号”的基础状态，该模型是$ t $ - $ j $型号的变体，并具有额外的自由度。该模型不仅是$ T $ - $ J $型号的概括，而且还是强耦合区域中两通道Kondo晶格模型的有效模型。低能量激发和相关函数是通过密度矩阵重新归一化的方法系统计算的，而四分之一填充的地面相图由tomonaga-luttinger液体，旋转间隙状态，通道间隙状态，绝缘体，绝缘体和相位分离确定。我们发现弱通道波动稳定了自旋隙状态，而强通道波动导致向绝缘体的过渡。
We study the ground state of the one-dimensional "$t$-$J_s$-$J_τ$ model," which is a variant of the $t$-$J$ model with additional channel degree of freedom. The model is not only a generalization of the $t$-$J$ model but also an effective model of the two-channel Kondo lattice model in the strong-coupling region. The low-energy excitations and correlation functions are systematically calculated by the density matrix renormalization group method, and the ground-state phase diagram at quarter filling consisting of a Tomonaga-Luttinger liquid, spin-gap state, channel-gap state, insulator, and phase separation is determined. We find that weak channel fluctuations stabilize the spin-gap state, while strong channel fluctuations lead to the transition to the insulator.
