1k citations · 18k across the 181 of their papers we have counts for
11 papers · 1 filter
Observation of g-wave altermagnetic multipole
Ryo Misawa, Rikuto Oiwa, Shunsuke Kitou +16
Over the past few years, altermagnets have emerged as a new class of collinear magnets with broken time-reversal symmetry, offering novel opportunities for spintronics beyond conve…
Metallic -wave magnet with commensurate spin helix
Rinsuke Yamada, Max T. Birch, Priya R. Baral +20
Antiferromagnetic states with spin-split electronic structure give rise to novel spintronic, magnonic, and electronic phenomena despite (near-) zero net magnetization. The simplest…
Braiding and fusion of Majorana fermions in minimal Kitaev spin liquid on a single hexagon with qubits
Motohiko Ezawa
We investigate the minimal Kitaev spin liquid on a single hexagon with three Ising-type exchange interactions proportional to , and . In the limit ,…
Exact solutions in two-dimensional topological superconductors: Hubbard interaction induced spontaneous symmetry breaking
Motohiko Ezawa
We present an exactly solvable model of a spin-triplet -wave topological superconductor on the honeycomb lattice in the presence of the Hubbard interaction for arbitrary interac…
Exact solutions and topological phase diagram in interacting dimerized Kitaev topological superconductors
Motohiko Ezawa
It was recently shown that an interacting Kitaev topological superconductor model is exactly solvable based on two-step Jordan-Wigner transformations together with one spin rotatio…
A reversible conversion between a skyrmion and a domain-wall pair in junction geometry
Yan Zhou, Motohiko Ezawa
A skyrmion is a topological texture in the continuum field theory. Recent experimental observation of skyrmions in chiral magnet evokes a flourish of its extensive study. Skyrmion…
Symmetry Protected Topological Charge in Symmetry Broken Phase: Spin-Chern, Spin-Valley-Chern and Mirror-Chern Numbers
Motohiko Ezawa
The Chern number is a genuine topological number. On the other hand, a symmetry protected topological (SPT) charge is a topological number only when a symmetry exists. We propose a…
Skyrmion Burst and Multiple Quantum Walk in Thin Ferromagnetic Films
Motohiko Ezawa
A giant Skyrmion collapses to a singular point by emitting spin waves in a thin ferromagnetic film, when external magnetic field is increased beyond the critical one. The remnant i…
Compact Skyrmions, Merons and Bimerons in Thin Chiral Magnetic Films
Motohiko Ezawa
A meron is a controversial topological excitation because it carries just one half of the topological charge unit. It is believed that it is tightly binded to another meron and can…
Giant Skyrmions Stabilized by Dipole-Dipole Interactions in Thin Ferromagnetic Films
Motohiko Ezawa
Motivated by a recent magnetization reversal experiment on a TbFeCo thin film, we study a topological excitation in the anisotropic nonlinear sigma model together with the Zeeman a…
Coulomb Blockade in Graphene Nanodisks
Motohiko Ezawa
Graphene nanodisk is a graphene derivative with a closed edge. The trigonal zigzag nanodisk with size has -fold degenerated zero-energy states. We investigate electron-elect…