Dynamical and topological properties of the Kitaev model in a [111] magnetic field

Article

关键词: SPIN-LIQUID-STATE;    KAGOME-LATTICE;    EXCITATIONS;    ALPHA-RUCL3;    ANYONS;   

DOI  :  10.1103/PhysRevB.98.014418

来源: SCIE

【 摘 要 】

The Kitaev model exhibits a quantum spin liquid hosting emergent fractionalized excitations. We study the Kitaev model on the honeycomb lattice coupled to a magnetic field along the [111] axis. Utilizing large-scale matrix product-based numerical models, we confirm three phases with transitions at different field strengths depending on the sign of the Kitaev exchange: a non-Abelian topological phase at low fields, an enigmatic intermediate regime only present for antiferromagnetic Kitaev exchange, and a field-polarized phase. For the topological phase, we numerically observe the expected cubic scaling of the gap and extract the quantum dimension of the non-Abelian anyons. Furthermore, we investigate dynamical signatures of the topological and the field-polarized phase using a matrix product operator-based time evolution method.

【 授权许可】

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