97 citations · 1.2k across the 69 of their papers we have counts for
69 papers
H-wave -- A Python package for the Hartree-Fock approximation and the random phase approximation
Tatsumi Aoyama, Kazuyoshi Yoshimi, Kota Ido +5
H-wave is an open-source software package for performing the Hartree--Fock approximation (HFA) and random phase approximation (RPA) for a wide range of Hamiltonians of interacting…
Minimal alternating current injection into carbon nanotubes
Kota Fukuzawa, Takeo Kato, Thibaut Jonckheere +2
We study theoretically the effect of electronic interactions in 1d systems on electron injection using periodic Lorentzian pulses, known as Levitons. We consider specifically a sys…
Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection
Tomohiro Fujimoto, Takayuki Kurihara, Yuta Murotani +7
We report the first observation of the spin Hall conductivity spectrum in GaAs at room temperature. Our terahertz polarimetry with a precision of several rads resolves the Farad…
Twisted bilayer graphene reveals its flat bands under spin pumping
Sonia Haddad, Takeo Kato, Jihang Zhu +1
The salient property of the electronic band structure of twisted bilayer graphene (TBG), at the so-called magic angle (MA), is the emergence of flat bands around the charge neutral…
Spin Pumping into Carbon Nanotubes
Kota Fukuzawa, Takeo Kato, Mamoru Matsuo +3
We theoretically study spin pumping from a ferromagnetic insulator (FI) into a carbon nanotube (CNT). By employing the bosonization method, we formulate the Gilbert damping induced…
Shear-Strain Controlled High-Harmonic Generation in Graphene
Tomohiro Tamaya, Hidefumi Akiyama, Takeo Kato
We propose a novel method for controlling the high-harmonic generation (HHG) with a high dynamic range in single-layer graphene. We find that, by utilizing shear strain, a signific…