133 citations · 458 across the 12 of their papers we have counts for
18 papers
Violation of the magnonic Wiedemann-Franz law in the strong nonlinear regime
Kouki Nakata, Yuichi Ohnuma, Se Kwon Kim
The celebrated Wiedemann-Franz (WF) law which governs the relation between charge and heat transport traces back to the experimental discovery in 1853 by Wiedemann and Franz. Despi…
Direct and alternating magnon spin currents across a junction interface irradiated by linearly polarized laser
Kouki Nakata, Yuichi Ohnuma
The developments in the field of quantum optics raise expectations that laser-matter coupling is a promising building block for magnonics. Here, we propose a method for the generat…
Magnonic thermal transport using the quantum Boltzmann equation
Kouki Nakata, Yuichi Ohnuma
We present a formula for thermal transport in the bulk of Bose systems based on the quantum Boltzmann equation (QBE). First, starting from the quantum kinetic equation and using th…
Optical polarimetric measurement of surface acoustic waves
Kotaro Taga, Ryusuke Hisatomi, Yuichi Ohnuma +4
Surface acoustic wave (SAW) is utilized in diverse fields ranging from physics, engineering, to biology, for transducing, sensing and processing various signals. Optical measuremen…
Spin hydrodynamic generation in graphene
Mamoru Matsuo, Denis A. Bandurin, Yuichi Ohnuma +2
Graphene hosts an ultra-clean electronic system with electron-electron collisions being the dominant source of scattering above liquid nitrogen temperatures. In this regime, the mo…
Microscopic Theory of the Spin Hall Magnetoresistance
Takeo Kato, Yuichi Ohnuma, Mamoru Matsuo
We consider a microscopic theory for the spin Hall magnetoresistance (SMR). We generally formulate a spin conductance at an interface between a normal metal and a magnetic insulato…