32 citations · 128 across the 23 of their papers we have counts for
8 papers · 1 filter
Theory of the Strain Engineering of Graphene Nanoconstrictions
Masahiko Hayashi, Hideo Yoshioka, Hikari Tomori +1
Strain engineering is one of the key technologies for using graphene as an electronic device: the strain-induced pseudo-gauge field reflects Dirac electrons, thus opening the so-ca…
A Numerical Formulation to Calculate the Conductance of Mesoscopic Conductors Using Singular Value Decomposition
Masahiko Hayashi
We present a new formulation to calculate the electric conductance of mesoscopic conductors by utilizing the singular value decomposition, which is a mathematical technique to mani…
The effect of large quantum fluctuation on the noise of a single-electron transistor
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
We theoretically investigate the noise of a single-electron transistor in the regime of large quantum fluctuation of charge out of equilibrium. We show that the charge noise is sup…
Noise of a single-electron transistor in the regime of large quantum fluctuations of island charge out of equilibrium
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
By using the drone-fermion representation and the Schwinger-Keldysh approach, we calculate the current noise and the charge noise for a single-electron transistor in the non-equili…
The current and the charge noise of a single-electron transistor in the regime of large charge fluctuations out of equilibrium
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
By using the Schwinger-Keldysh approach, we evaluate the current noise and the charge noise of the single-electron transistor (SET) in the regime of large charge fluctuations cause…
Orbital Magnetism in Three-Dimensional Quantum Dots
Takeru Suzuki, Hiroshi Imamura, Masahiko Hayashi +1
We study orbital magnetism in a three-dimensional (3D) quantum dot with a parabolic confining potential. We calculate the free energy of the system as a function of the magnetic fi…
The effect of charge fluctuation on a normal-superconducting-normal single-electron transistor
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
We theoretically investigate quantum fluctuation of charge between even and odd states of a normal-superconducting-normal single-electron tunneling transistor. It is shown that due…
Charge fluctuation between even and odd states of a superconducting island
Yasuhiro Utsumi, Hiroshi Imamura, Masahiko Hayashi +1
We theoretically investigate effects of quantum fluctuation between even and odd charge states on the transport properties of a normal-superconducting-normal single-electron tunnel…