5 papers
Schwinger boson perturbation theory for spin- Kitaev-Heisenberg magnets: phase diagram and dynamical response near Kitaev spin liquids
Daiki Sasamoto, Joji Nasu
We develop a Schwinger boson perturbative framework for the spin- Kitaev-Heisenberg model. The spin-liquid saddle point of the pure Kitaev model is used as the unperturbed state…
Thermal Hall Signatures of Distinct Schwinger-Boson Flux Sectors on the Honeycomb Lattice
Daiki Sasamoto
Thermal transport offers a bulk probe of charge-neutral excitations in frustrated magnets. It remains challenging, however, to determine whether such transport can distinguish diff…
Chiral bosonic mean-field Ansatz and spin dynamics in spin-1 Kitaev magnets
Daiki Sasamoto, Arnaud Ralko, Jaime Merino +1
The Kitaev model is a paradigmatic system for realizing quantum spin liquids, but its higher-spin extensions are not exactly solvable, and their spin dynamics is less well understo…
Dynamical spin correlations in kagome antiferromagnets: comparison of Abrikosov fermion and Schwinger boson approaches beyond mean field
Daiki Sasamoto, Joji Nasu
Quantum spin liquids exhibit fractionalized spin excitations as a consequence of strong quantum many-body effects. The kagome antiferromagnetic Heisenberg model is a promising cand…
Schwinger boson theory for Kitaev quantum spin liquids
Daiki Sasamoto, Joji Nasu
The Kitaev model is an exactly solvable model with a quantum spin liquid ground state. While this model was originally proposed as an spin model on a honeycomb lattice, ext…