论文标题
在蜂窝状晶格上扭动SU（4）旋转轨道液体的狄拉克锥
Twisting the Dirac cones of the SU(4) spin-orbital liquid on the honeycomb lattice
论文作者
论文摘要
通过将密度矩阵重归其化组（DMRG）方法与Gutzwiller投影波函数相结合，我们研究了蜂窝晶状体上的SU（4）对称自旋 - 轨道模型。我们发现，地基状态可以通过Gutzwiller预计$π$ -Flux状态，并在四分之一填充时具有Dirac-type无间隙激发。尽管这些狄拉克点因有限缸上的紧急量规通量而掩盖，但它们控制了热力学极限中的临界行为。通过插入$θ=π$旋转通量以扭转边界条件，我们可以将无间隙扇区转移到基态，这为存在无间隙的狄拉克旋转轨道液体提供了令人信服的证据。
By combining the density matrix renormalization group (DMRG) method with Gutzwiller projected wave functions, we study the SU(4) symmetric spin-orbital model on the honeycomb lattice. We find that the ground states can be well described by a Gutzwiller projected $π$-flux state with Dirac-type gapless excitations at one quarter filling. Although these Dirac points are gapped by emergent gauge fluxes on finite cylinders, they govern the critical behavior in the thermodynamic limit. By inserting a $θ=π$ spin flux to twist the boundary condition, we can shift the gapless sector to the ground state, which provides compelling evidence for the presence of a gapless Dirac spin-orbital liquid.
