Quantum Phases in the Honeycomb-Lattice -- Ferro-Antiferromagnetic Model
arXiv:2304.06062 · doi:10.1103/PhysRevB.108.L180406
Abstract
Using large-scale density-matrix renormalization group calculations and minimally augmented spin-wave theory, we demonstrate that the phase diagram of the quantum -- ferro-antiferromagnetic model on the honeycomb lattice differs dramatically from the classical one. It hosts the double-zigzag and Ising-z phases as unexpected intermediaries between ferromagnetic and zigzag states that are also extended beyond their classical regions of stability. In broad agreement with quantum order-by-disorder arguments, these collinear phases replace the classical spiral state.
arXiv comment7+9 pages, 5+9 figures; Fixed typos in Sec.VII of SM, others
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