76 citations · 222 across the 12 of their papers we have counts for
12 papers
Topological Magnon-Plasmon Hybrids
Tomoki Hirosawa, Pieter M. Gunnink, Alexander Mook
We study magnon-plasmon coupling in effectively two-dimensional stacks of van der Waals layers in the context of the band structure topology. Invoking the quasiparticle approximati…
Vortex Crystals in Tetrahedral Antiferromagnets: Fractional Charges and Topological Magnons
Tomoki Hirosawa, Alexander Mook, Maria Azhar
We report the formation of a vortex crystal in the tetrahedral antiferromagnetic order on a triangular lattice. The noncoplanar tetrahedral state consists of four su…
Density Matrix Renormalization Group Study of Domain Wall Qubits
Guanxiong Qu, Ji Zou, Daniel Loss +1
Nanoscale topological spin textures in magnetic systems are emerging as promising candidates for scalable quantum architectures. Despite their potential as qubits, previous studies…
Data-driven reconstruction of spectral conductivity and chemical potential from thermoelectric transport data
Tomoki Hirosawa, Frank Schäfer, Hideaki Maebashi +2
The spectral conductivity, i.e., the electrical conductivity as a function of the Fermi energy, is a cornerstone in determining the thermoelectric transport properties of electrons…
Magnetoelectric Cavity Magnonics in Skyrmion Crystals
Tomoki Hirosawa, Alexander Mook, Jelena Klinovaja +1
We present a theory of magnetoelectric magnon-photon coupling in cavities hosting noncentrosymmetric magnets. Analogously to nonreciprocal phenomena in multiferroics, the magnetoel…
Laser-controlled real- and reciprocal-space topology in multiferroic insulators
Tomoki Hirosawa, Jelena Klinovaja, Daniel Loss +1
Magnetic materials in which it is possible to control the topology of their magnetic order in real space or the topology of their magnetic excitations in reciprocal space are highl…
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…