7 papers
Superconducting Gap Structures in Wallpaper Fermion Systems
Kaito Yoda, Ai Yamakage
We theoretically investigate the superconducting gap structures in wallpaper fermions, which are surface states of topological nonsymmorphic crystalline insulators, based on a two-…
Spin Pumping into two-dimensional systems
Yuya Ominato, Masaki Yama, Ai Yamakage +2
In this review, we present recent theoretical developments on spin transport phenomena probed by ferromagnetic resonance (FMR) modulation in two-dimensional systems coupled to magn…
Charge and Valley Hydrodynamics in the Quantum Hall Regime of Gapped Graphene
Danyu Shu, Hiroshi Funaki, Ai Yamakage +2
We develop a unified viscous hydrodynamics for charge and valley transport in gapped graphene in the quantum Hall regime. We redefine Hall viscosity as a response to static electri…
Symmetry-adapted models for multifold fermions with spin-orbit coupling
Koki Satow, Ai Yamakage
Multifold fermions, quasiparticles with multiple degeneracy protected by crystalline symmetries, exhibit a variety of intriguing phenomena stemming from their large topological cha…
Magnon-mediated superconductivity on ferromagnetic wallpaper fermions
Koki Mizuno, Ai Yamakage
We study two-dimensional superconductivity mediated by magnetic fluctuations at the interface between a ferromagnetic insulator and the nonsymmorphic topological crystalline insula…
Directional propagation of quantum Hall viscous fluid by nano-structural engineering
Hiroshi Funaki, Ai Yamakage, Ryotaro Sano +1
We present a microscopic theory of the viscous electron fluid in the quantum Hall state based on the nonequilibrium Green's function method and the von Neumann lattice representati…