102 citations · 466 across the 12 of their papers we have counts for
12 papers
Enhanced ferromagnetism in artificially stretched lattice in quasi two-dimensional Cr2Ge2Te6
Hiroshi Idzuchi, Andres E Llacsahuanga Allcca, Anh Khoa Augustin Lu +9
In the fundamental understanding of magnetic interactions between atoms in solids, the crystal lattice is one of the key parameters. As the effective tool for controlling the latti…
Gapless States Localized along a Staircase Edge in Second-Order Topological Insulators
Yuki Nagasato, Yositake Takane, Yukinori Yoshimura +2
A second-order topological insulator on a two-dimensional square lattice hosts zero-dimensional states inside a band gap. They are localized near and cor…
Unveiling quasiparticle dynamics of topological insulators through Bayesian modelling
Satoru Tokuda, Seigo Souma, Kouji Segawa +4
Quasiparticle - a key concept to describe interacting particles - characterizes electron-electron interaction in metals (Fermi liquid) and electron pairing in superconductors. Whil…
Effective-mass theory of collapsed carbon nanotubes
Takeshi Nakanishi, Tsuneya Ando
Band structure is theoretically studied in partially flattened carbon nanotubes within an effective-mass scheme. Effects of inter-wall interactions are shown to be important in non…
Interface Landau levels in graphene monolayer-bilayer junction
Mikito Koshino, Takeshi Nakanishi, Tsuneya Ando
Electronic structure of graphene monolayer-bilayer junction in a magnetic field is studied within an effective-mass approximation. The energy spectrum is characterized by interface…
Transmission through a boundary between monolayer and bilayer graphene
Takeshi Nakanishi, Mikito Koshino, Tsuneya Ando
The electron transmission between monolayer and bilayer graphene is theoretically studied for zigzag and armchair boundaries within an effective-mass scheme. Due to the presence of…
Optical response of finite-length carbon nanotubes
Takeshi Nakanishi, Tsuneya Ando
Optical response of finite-length metallic carbon nanotubes is calculated including effects of induced edge charges in a self-consistent manner. The results show that the main reso…
Thermopower of a Quantum Dot in a Coherent Region
Takeshi Nakanishi, Takeo Kato
Thermoelectric power due to coherent electron transmission through a quantum dot is theoretically studied. In addition to the known features related to resonant peaks, we show that…
Transport through the Interface between a Semiconducting Carbon Nanotube and a Metal Electrode
Takeshi Nakanishi, Adrian Bachtold, Cees Dekker
We report a numerical study of the tunnel conductance through the Schottky barrier at the contact between a semiconducting carbon nanotube and a metal electrode. In a planar gate m…
Variational Monte Carlo Study on the Superconductivity in the Two-Dimensional Hubbard Model
Kunihiko Yamaji, Takashi Yanagisawa, Takeshi Nakanishi +1
The possibility of superconductivity (SC) in the 2D Hubbard model (2DH) was investigated by means of the variational Monte Carlo method. The energy gain of the d-wave SC state, obt…
Numerical Study of Inelastic Scatterings by Time-Dependent Random Potentials in Two-Dimensional Systems
Takeshi Nakanishi, Tomi Ohtsuki
Diffusion of electrons in a two-dimensional system with time-dependent random potentials is investigated numerically. In the absence of spin-orbit scattering, the conductivity show…
Dephasing by time-dependent random potentials
Takeshi Nakanishi, Tomi Ohtsuki, Tohru Kawarabayashi
Diffusion of electrons in a two-dimensional system with time-dependent random potentials is investigated numerically. The correction to the conductivity due to inelastic scattering…