12 citations · 23 across the 15 of their papers we have counts for
15 papers
Competition between on-site and off-site pairing phases and surface spectra in superconducting wallpaper fermion systems
Kaito Yoda, Ai Yamakage
We theoretically investigate the competition between on-site and off-site pairings in superconducting topological crystalline insulators hosting wallpaper fermions, a class of surf…
Quantum Geometric Origin of Hall Viscosity and Nonlocal Hall Conductivity in Lattice Bands
Danyu Shu, Ryotaro Sano, Ai Yamakage +2
We show that Hall viscosity in lattice bands is governed by a band-projected electric quadrupole encoded within the quantum geometry: Berry curvature sets the projected-coordinate…
Gyromagnetic Quantum Friction in Rayleigh Vorticity Baths
Mamoru Matsuo, Ryotaro Sano, Ai Yamakage +2
We identify an intrinsic zero-temperature relaxation channel for near-surface spins gyromagnetically coupled to Rayleigh-wave vorticity. This surface-mode contribution requires no…
Thermoelectric enhancement from an asymmetric spectral-conductivity cusp in spin-1 chiral fermions
Risako Kikuchi, Junya Endo, Ai Yamakage
A recent study showed that, in spin-1 chiral fermion systems composed of two linearly dispersing bands and one trivial band, impurity scattering produces an asymmetric cusp in the…
Generalized continuum theory of phonon angular momentum in crystals
Mamoru Matsuo, Naoki Nishimura, Ai Yamakage +1
We formulate a generalized continuum theory of phonon angular momentum in crystals by introducing a local SO(3) material frame in addition to the macroscopic displacement field. Th…
Ferromagnetic resonance modulation in topological materials with bulk--boundary coexistence
Shun Muto, Yuya Ominato, Takeo Kato +2
We extend ferromagnetic resonance (FMR) modulation theory to describe systems in which bulk and boundary states of topological materials coexist, with both appearing at the same en…
Designing XY and Dzyaloshinskii--Moriya couplings in Majorana Cooper pair boxes
Manato Teranishi, Shintaro Hoshino, Ai Yamakage
We theoretically study how to design spin couplings in networks of Majorana Cooper pair boxes (MCBs) connected by multiple normal-metal leads. The inter-box interaction is generate…
Double-twisted surface spectrum from hybridized Majorana Kramers pairs and wallpaper fermions
Kaito Yoda, Ai Yamakage
We theoretically investigate the superconducting surface states of wallpaper fermions, which are surface quasiparticles of topological nonsymmorphic crystalline insulators protecte…
Realization of a universal topological waveguide by tuning adiabatic geometry
Keita Funayama, Jotaro J. Nakane, Ai Yamakage
Quantum valley Hall-based topological phases have been attracting attention across diverse fields as a robust platform for wave guidance due to their high compatibility with engine…
Orbital-related gyrotropic responses in CuWSe and chirality indicator
Kazuki Nakazawa, Terufumi Yamaguchi, Ai Yamakage
In recent years, counterparts of phenomena studied in spintronics have been actively explored in the orbital sector. The relationship between orbital degrees of freedom and crystal…
Cusped Electrical Conductivity in Spin-1 Chiral Fermion Systems Arising from Multifold Band Degeneracy
Risako Kikuchi, Junya Endo, Ai Yamakage
The energy-dependent electrical conductivity in spin-1 chiral fermion systems with disorder is studied using the self-consistent Born approximation. A distinct cusp-like feature ap…
Band Curvature Effects on Quantum Transport of Spin-1 Chiral Fermion Systems
Risako Kikuchi, Ai Yamakage
We theoretically investigate the quantum transport properties of three-dimensional spin-1 chiral fermion systems with a curved trivial band. In the multiband system with two distin…
Theory of Nonlinear Hall Effect Induced by Electric Field and Temperature Gradient in 3D Chiral Magnetic Textures
Terufumi Yamaguchi, Kazuki Nakazawa, Ai Yamakage
We investigate the current proportional to the cross product of an electric field and a temperature gradient, which we call the Nonlinear Chiral Thermo-Electric (NCTE) Hall effect,…
Nonlinear charge and thermal transport properties induced by orbital magnetic moment in chiral crystal cobalt monosilicide
Kazuki Nakazawa, Terufumi Yamaguchi, Ai Yamakage
The existence of exotic singularities in momentum space, such as spin-1 excitations and Rarita-Schwinger-Weyl (RSW) fermions, has been discussed so far to explore unique phenomena…
Nonlinear charge transport properties in chiral tellurium
Kazuki Nakazawa, Terufumi Yamaguchi, Ai Yamakage
Extensive research has focused on phenomena arising from the chirality of crystalline or magnetic structures. Recently, we have proposed the "Nonlinear Chiral Thermo-Electric (NCTE…