Spin textures with nontrivial topology, such as vortices and skyrmions, have attracted
attention as a source of unconventional magnetic, transport, and optical phenomena …

Multiple-Q states as represented by a magnetic skyrmion crystal and hedgehog crystal have
been extensively studied in recent years owing to their unconventional physical properties …

We theoretically investigate multiple-Q spin textures, which are composed of superpositions
of spin density waves with different wave numbers, for an effective spin model of …

We use the density matrix renormalization group (DMRG) algorithm to study the phase
diagram of the spin-1 2 Heisenberg model on a honeycomb lattice with first (J 1) and second …

We explore the phase diagram of the Kitaev-Heisenberg model with nearest neighbor
interactions on the honeycomb lattice using the exact diagonalization of finite systems …

In quantum magnets, magnetic moments fluctuate heavily and are strongly entangled with
each other, a fundamental distinction from classical magnetism. Here, with inelastic neutron …

Many two-dimensional physical systems ranging from atomic-molecular condensates to low-
dimensional superconductors and liquid-crystal films are described by coupled XY models …

Strongly correlated systems with geometric frustrations can host the emergent phases of
matter with unconventional properties. Here, we study the spin S= 1 Heisenberg model on …

Motivated by the recent theoretical study by Okubo et al.[Phys. Rev. Lett. 108, 017206 (2012)
10.1103/PhysRevLett. 108.017206] on the possible realization of the frustration-induced …

A large part of the interest in magnets with frustrated antiferromagnetic interactions comes
from the many new phases found in applied magnetic field. In this article, we explore some …