26 papers
Two routes to quantum anomalous Hall states in altermagnets
Makoto Naka, Shuntaro Sumita, Yukitoshi Motome +1
We theoretically propose two possible routes to realizing quantum anomalous Hall states in altermagnetic materials. We consider a minimal square-lattice Hubbard model with antisymm…
Electron-phonon-coupled Langevin dynamics for strongly-correlated insulators
Rico Pohle, Yukitoshi Motome, Terumasa Tadano +1
The Landau-Lifshitz-Gilbert (LLG) equations are widely used to study spin dynamics in Mott insulators. However, because energy damping is typically introduced phenomenologically, t…
Kitaev Meets Affleck-Kennedy-Lieb-Tasaki: Competing Quantum Disorder in Spin-3/2 Honeycomb Systems
Sogen Ikegami, Kiyu Fukui, Rico Pohle +1
We investigate an S=3/2 quantum spin model on a two-dimensional honeycomb lattice that continuously interpolates between two paradigmatic quantum disordered states with distinct en…
Monte Carlo Study of the Phase Transition of the Model on a Diamond Lattice
Sena Watanabe, Yukitoshi Motome, Haruki Watanabe
We study the phase transition of the classical model on a diamond lattice by Monte Carlo simulations using the Wolff cluster algorithm. Finite-size scaling (FSS) analysis of t…
Topological Phase Transitions and Their Thermodynamic Fate in Arbitrary- Pyrochlore Spin Ice
Sena Watanabe, Yukitoshi Motome, Haruki Watanabe
We develop a self-contained theoretical framework that classifies the topological phases and critical phenomena of classical pyrochlore magnets with arbitrary spin , subject to…
Bond-density-wave orders induced by geometric frustration in the kagome metal CeRu3Si2
Ryo Misawa, Shunsuke Kitou, Rinsuke Yamada +9
Geometric frustration gives rise to vast manifolds of degenerate ground states and competing orders in spin and charge systems. Typically, classical ground states are governed by a…