Twisting the Dirac cones of the SU(4) spin-orbital liquid on the honeycomb lattice

被引：10

作者：

Jin, Hui-Ke ^{[1
]}

Natori, W. M. H. ^{[2
]}

Knolle, Johannes ^{[1
,2
,3
,4
]}

机构：

[1] Tech Univ Munich, Dept Phys TQM, James Franck Str 1, D-85748 Garching, Germany

[2] Inst Laue Langevin, BP 156,41 Ave Martyrs, F-38042 Grenoble 9, France

[3] Imperial Coll London, Blackett Lab, London SW7 2AZ, England

[4] Munich Ctr Quantum Sci & Technol MCQST, D-80799 Munich, Germany

来源：

PHYSICAL REVIEW B | 2023年 / 107卷 / 18期

基金：

欧洲研究理事会;

关键词：

LARGE-N LIMIT; MODEL; MAGNETISM;

D O I：

10.1103/PhysRevB.107.L180401

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 pi-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 theta = pi 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.

引用

页数：6

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