169 citations · 695 across the 25 of their papers we have counts for
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Nonlinear magnon spin Nernst effect in antiferromagnets and strain-tunable pure spin current
Hiroki Kondo, Yutaka Akagi
In this Letter, we study the spin Nernst effect (SNE) of magnons in the nonlinear response regime. We derive the formula for the nonlinear magnon spin Nernst current by solving the…
Dirac surface states in magnonic analogs of topological crystalline insulators
Hiroki Kondo, Yutaka Akagi
We propose magnonic analogs of topological crystalline insulators which possess Dirac surface states protected by the combined symmetry of time-reversal and half translation. Const…
Topological Invariant for Bosonic Bogoliubov-de Gennes Systems with Disorder
Yutaka Akagi
Using the method of noncommutative geometry, we define a topological invariant in disordered bosonic Bogoliubov-de Gennes systems, which possess a unique mathematical property---no…
Non-Hermiticity and topological invariants of magnon Bogoliubov-de Gennes systems
Hiroki Kondo, Yutaka Akagi, Hosho Katsura
Since the theoretical prediction and experimental observation of the thermal Hall effect of magnons, a variety of novel phenomena that may occur in magnonic systems have been propo…
Three-dimensional topological magnon systems
Hiroki Kondo, Yutaka Akagi, Hosho Katsura
We propose a class of models for a magnonic analog of topological insulators in three dimensions. The models have pseudo-time-reversal symmetry which ensures the existence of boson…
Topological Invariant for Magnon Spin Hall Systems
Hiroki Kondo, Yutaka Akagi, Hosho Katsura
We propose a definition of a topological invariant for magnon spin Hall systems which are the bosonic analog of two-dimensional topological insulators in class AII.…
A New Numerical Method for Topological Insulators with Strong Disorder
Yutaka Akagi, Hosho Katsura, Tohru Koma
We propose a new method to numerically compute the indices for disordered topological insulators in Kitaev's periodic table. All of the indices are kn…