7 papers
Consistent Evaluation of Operators Involving the Position Operator in the Bloch Representation: Application to the Orbital Moment
Daehyeon An, Junmo Jeon, Se Kwon Kim
The position operator plays a central role in condensed-matter observables such as velocity, orbital moment, and electric polarization. In solid-state physics, the evaluation of op…
Frustration of harmonic and solitonic helimagnetism on the body-centered tetragonal lattice of GdAlSi
Ryota Nakano, Rinsuke Yamada, Oleg I. Utesov +9
The triangular lattice antiferromagnet (TLAF) with nearest-neighbor exchange interaction is a model platform in the field of frustrated magnetism. Here, anharmonic (`up-up-down') a…
Quantum Scalar Spin Chirality in Coplanar Kagome Antiferromagnets
Nanse Esaki, Gyungchoon Go, Se Kwon Kim
We theoretically demonstrate that quantum fluctuations inherent to antiferromagnets can generate scalar spin chirality at zero temperature even in coplanar ordered magnets. In a ka…
Domain Wall Networks as Skyrmion Crystals in Chiral Magnets
Seungho Lee, Toshiaki Fujimori, Muneto Nitta +1
We theoretically investigate the ground states of a chiral magnet with a square anisotropy and show that it supports domain wall networks as stable ground states. A domain wall jun…
Stable singular fractional skyrmion spin texture from the quantum Kelvin-Helmholtz instability
SeungJung Huh, Wooyoung Yun, Gabin Yun +7
Topology profoundly influences diverse fields of science, providing a powerful framework for classifying phases of matter and predicting nontrivial excitations, such as solitons, v…
Effective Field Theory of a Noncollinear Altermagnet
Seungho Lee, Se Kwon Kim
We derive an effective field theory for a noncollinear altermagnet and magnons on top of the noncollinear ground state from an altermagnetic Heisenberg model. We obtain the ground-…