232 citations · 1k across the 33 of their papers we have counts for
4 papers · 1 filter
Ferromagnetism and spin excitations in topological Hubbard models with a flatband
Xiao-Fei Su, Zhao-Long Gu, Zhao-Yang Dong +2
We study the spin-1 excitation spectra of the flatband ferromagnetic phases in interacting topological insulators. As a paradigm, we consider a quarter filled square lattice Hubbar…
Spectral properties of the square-lattice antiferromagnetic J1-J2 Heisenberg model: confinement and deconfinement of spinons
Shun-Li Yu, Wei Wang, Zhao-Yang Dong +2
Based on the mapping between spin operators and hard-core bosons, we extend the cluster perturbation theory to spin systems and study the whole excitation spectrum of the a…
Response and phase transition of a Kitaev spin liquid in a local magnetic field
Shuang Liang, Bosen He, Zhaoyang Dong +3
We study the response of the Kitaev spin liquid (KSL) to a local magnetic field perpendicular to the Kitaev honeycomb lattice. The local magnetic field induces a dynamical excitati…
Topological Magnons in a One-dimensional Itinerant Flatband Ferromagnet
Xiao-Fei Su, Zhao-Long Gu, Zhao-Yang Dong +1
Different from previous scenarios that topological magnons emerge in local spin models, we propose an alternative that itinerant electron magnets can host topological magnons. A on…