234 citations · 1.7k across the 51 of their papers we have counts for
51 papers
Classification of magnon thermal Hall systems based on U(1) to non-Abelian gauge fields
Masataka Kawano, Chisa Hotta
Magnon thermal Hall effect in insulating magnets is the manifestation of Berry curvature in magnon bands, which is formulated using the emergent gauge fields that act on magnons as…
Deriving quantum spin model for a zigzag-chain ytterbium magnet with anisotropic exchange interactions
Hidehiro Saito, Hiroki Nakai, Chisa Hotta
We derive a quantum spin Hamiltonian of the spin-1/2 zigzag chain realized in a rare earth ytterbium-based magnetic insulator, YbCuS2. This material undergoes a transition at 0.95K…
Thermal pure matrix product state in two dimensions: tracking thermal equilibrium from paramagnet down to the Kitaev honeycomb spin liquid state
Matthias Gohlke, Atsushi Iwaki, Chisa Hotta
We present the first successful application of the matrix product state (MPS) representing a thermal quantum pure state (TPQ) in equilibrium in two spatial dimensions over almost t…
Sine-square deformed mean-field theory
Masataka Kawano, Chisa Hotta
We develop a theory that accurately evaluates quantum phases with any large-scale emergent structures including incommensurate density waves or topological textures without {\it a…
Emergent SU(3) magnons and thermal Hall effect in the antiferromagnetic skyrmion lattice
Hikaru Takeda, Masataka Kawano, Kyo Tamura +9
Complexity of quantum phases of matter is often understood by the underlying gauge structures, as was recognized by the and U(1) gauge theory description of spin liq…
Spin-orbit coupled Hubbard skyrmions
Ryo Makuta, Chisa Hotta
When the material phases exhibit topological quantum numbers, they host defects protected by the nontrivial topology. Magnetic skyrmions are such ``quantized" objects and although…