Transient Oscillation of Currents in Quantum Hall Effect of Bloch Electrons (2007)
Machida, Manabu, Goryo, Jun, Hatano, Naomichi
We consider the quantum Hall effect of two-dimensional electrons with a periodic potential and study the time dependence of the Hall and longitudinal currents when the electric field is applied...
Temporal Oscillation of Conductances in Quantum Hall Effect of Bloch Electrons (2006)
Machida, Manabu, Hatano, Naomichi, Goryo, Jun
We study a nonadiabatic effect on the conductances in the quantum Hall effect of two-dimensional electrons with a periodic potential. We found that the Hall and longitudinal conductances oscillate in...
Distribution of the spacing between two adjacent avoided crossings (2005)
We consider the frequency at which avoided crossings appear in an energy level structure when an external field is applied to a quantum chaotic system. The distribution of the spacing in the...
Temperature dependence of ESR intensity for the nanoscale molecular magnet V15 (2005)
Machida, Manabu, Iitaka, Toshiaki, Miyashita, Seiji
The electron spin resonance (ESR) of nanoscale molecular magnet ${\rm V}_{15}$ is studied. Since the Hamiltonian of ${\rm V}_{15}$ has a large Hilbert space and numerical calculations of the ESR...
Frequency Dependence of Quantum Localization in a Periodically Driven System (2002)
Machida, Manabu, Saito, Keiji, Miyashita, Seiji
We study the quantum localization phenomena for a random matrix model belonging to the Gaussian orthogonal ensemble (GOE). An oscillating external field is applied on the system. After the transient...