6 citations · 14 across the 14 of their papers we have counts for
14 papers
Microscopic derivation of the microstretch theory for carbon nanotubes
Naoki Nishimura, Mamoru Matsuo, Takeo Kato
Twisted carbon nanotubes support phonons involving not only torsion, naturally associated with microrotation, but also radial breathing, which requires a scalar stretch degree of f…
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…
Spin Peltier effect in graphene
Xin Theng Lee, Xin Hu, Yuya Ominato +3
In this work, we theoretically investigate the spin-Peltier effect in a heterostructure composed of graphene and a ferromagnetic insulator (FI). Using a microscopic formalism based…
Spin Seebeck effect in magnetic junctions with a compensated ferrimagnet
Xin Theng Lee, Takahiro Misawa, Mamoru Matsuo +1
Compensated ferrimagnets enable ferromagnet-like spin transport without net magnetization. We study the spin Seebeck effect in a compensated ferrimagnet/normal-metal junction using…
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…
Torsional oscillation of carbon nanotubes driven by electron spins
Koji Yamada, Wataru Izumida, Mamoru Matsuo +1
We theoretically investigate the current-induced excitation of torsional vibrations in a suspended carbon nanotube (CNT) quantum dot. By considering a CNT clamped between half-meta…
Spin Current Generation Controlled by the Néel State in a Compensated Ferrimagnet
Xin Theng Lee, Takahiro Misawa, Mamoru Matsuo +1
Compensated ferrimagnets, which break sublattice and time-reversal symmetries in the ground state, exhibit an isotropic ferromagnet-like spin splitting despite a vanishing net magn…
Theory of spin Seebeck effect activated by acoustic chiral phonons
Naoki Nishimura, Takumi Funato, Mamoru Matsuo +1
We theoretically explore the generation of spin current driven by a temperature gradient in a junction between a chiral insulator and a normal metal. Based on the gyromagnetic resp…
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…
Theory of spin pumping and inverse Rashba-Edelstein effect in a two-dimensional electron gas
Masaki Yama, Mamoru Matsuo, Takeo Kato
We theoretically investigate spin transport in a junction system composed of a ferromagnetic insulator (FI) and a two-dimensional electron gas (2DEG) with both Rashba and Dresselha…
Microscopic theory of Rashba-Edelstein magnetoresistance
Masaki Yama, Mamoru Matsuo, Takeo Kato
We theoretically study Rashba-Edelstein magnetoresistance (REMR) in a two-dimensional electron gas (2DEG) system with Rashba and Dresselhaus spin-orbit interactions. We consider a…
Fluctuations in Spin Dynamics Excited by Pulsed Light
Tetsuya Sato, Shinichi Watanabe, Mamoru Matsuo +1
We theoretically investigate nonequilibrium spin fluctuations in a ferromagnet induced by a light pulse. Using a Lindblad equation consistent with the Landau-Lifshitz-Gilbert equat…
Spin pumping into quantum spin chains
Shunsuke C. Furuya, Mamoru Matsuo, Takeo Kato
We theoretically investigate spin pumping into a quantum easy-plane ferromagnetic spin chain system. This quantum spin chain is effectively described by the Tomonaga-Luttinger (TL)…