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18 papers · 1 filter
Simulation of polymers in a curved box: Variable range bonding models
Y. Y. Suzuki, T. Dotera, M. Hirabayashi
We propose new polymer models for Monte Carlo simulation and apply them to a polymer chain confined in a relatively thin box which has both curved and flat sides, and show that eit…
Electronic pressure on ferromagnetic domain wall
Gen Tatara, Yasuhiro Tokura
The scattering of the eletron by a domain wall in a nano-wire is studied perturbatively to the lowest order. The correction to the thermodaynamic potential of the electron system d…
Transient current spectroscopy of a quantum dot in the Coulomb blockade regime
Toshimasa Fujisawa, Yasuhiro Tokura, Yoshiro Hirayama
Transient current spectroscopy is proposed and demonstrated in order to investigate the energy relaxation inside a quantum dot in the Coulomb blockade regime. We employ a fast puls…
Josephson effects in a superconductor-normal metal mesoscopic structure with a dangling superconducting arm
R. Shaikhaidarov, A. F. Volkov, H. Takayanagi +2
We studied a mesoscopic cross-like normal metal structure connected to two superconducting (S) and two normal (N) reservoirs. We observed the Josephson effect under unusual conditi…
The Kondo Effect in the Unitary Limit
W. G. van der Wiel, S. De Franceschi, T. Fujisawa +3
We observe a strong Kondo effect in a semiconductor quantum dot when a small magnetic field is applied. The Coulomb blockade for electron tunneling is overcome completely by the Ko…
Inelastic tunneling in a double quantum dot coupled to a bosonic environment
Toshimasa Fujisawa, Wilfred G. van der Wiel, Leo P. Kouwenhoven
Coupling a quantum system to a bosonic environment always give rise to inelastic processes, which reduce the coherency of the system. We measure energy dependent rates for inelasti…