76 citations · 91 across the 3 of their papers we have counts for
6 papers
Magnonic Quadrupole Topological Insulator in Antiskyrmion Crystals
Tomoki Hirosawa, Sebastian A. Diaz, Jelena Klinovaja +1
When the crystalline symmetries that protect a higher-order topological phase are not preserved at the boundaries of the sample, gapless hinge modes or in-gap corner states cannot…
Spin Wave Radiation by a Topological Charge Dipole
Sebastian A. Diaz, Tomoki Hirosawa, Daniel Loss +1
The use of spin waves (SWs) as data carriers in spintronic and magnonic logic devices offers operation at low power consumption, free of Joule heating. Nevertheless, the controlled…
Nuclear spin relaxation rate near the disorder-driven quantum critical point in Weyl fermion systems
Tomoki Hirosawa, Hideaki Maebashi, Masao Ogata
Disorder such as impurities and dislocations in Weyl semimetals (SMs) drives a quantum critical point (QCP) where the density of states at the Weyl point gains a non-zero value. Ne…
Chiral Magnonic Edge States in Ferromagnetic Skyrmion Crystals Controlled by Magnetic Fields
Sebastian A. Diaz, Tomoki Hirosawa, Jelena Klinovaja +1
Achieving control over magnon spin currents in insulating magnets - where dissipation due to Joule heating is highly suppressed - is an active area of research that could lead to e…
Nuclear Magnetic Relaxation and Knight Shift Due to Orbital Interaction in Dirac Electron Systems
Hideaki Maebashi, Tomoki Hirosawa, Masao Ogata +1
We study the nuclear magnetic relaxation rate and Knight shift in the presence of the orbital and quadrupole interactions for three-dimensional Dirac electron systems (e.g., bismut…
Nuclear Spin Relaxation Time due to the Orbital Currents in Dirac Electron Systems
Tomoki Hirosawa, Hideaki Maebashi, Masao Ogata
The nuclear spin relaxation time is calculated taking account of the contributions from orbital currents of Dirac electrons. We consider a simple model of non-interacting Dir…