Research Topics
[Frame]
Theoretical Study of Quantum Transports in Mesoscopic Systems
- Electrical Conduction in Carbon Nanotubes
We have investigated electronic transport in carbon nanotubes by using both analytic (effective-mass scheme) and numerical methods (recursive Green's function) in the presence and absence of magnetic fields. We have shown an absence of back scattering in metallic carbon nanotubes, even when scatterers have a potential range longer than the lattice constant. [Absence of Back Scattering] We have also investigated the effect of point defects [Point Defects] and topological defects [Topological Defects] on carbon nanotubes, contact with dirty electrode [Contact] and crossed nanotubes. [Crossed Carbon Nanotubes] Logic circuits with nanotube transistors have studied with experimentalists. [Application] - Fano effects in an Aharonov-Bohm ring with a quantum dot
The quantum transport in an AB ring with a quantum dot has been studied. We have shown Fano effects in the calculated conductance and given an explanation for the recent experiment by Kobayashi et al. (PRL 88, 256806 (2002). - Fermi-Edge Singularity in a Lateral Periodic Potential
This work is a collaboration with experimentalists. - Numerical Study of Quantum Transport Using Equation-of-Motion Method
We have investigated weak-localization phenomena in two-dimensional systems in the presence of time-dependent potentials by solving numerically the time-dependent Schrödinger equation. - Quantum Transport in Antidot Lattices
We have explained AAS oscillations observed in the magneto resistance in antidot lattices by using recursive Green's function technique. - Variational Monte Carlo Calculation in Two-Dimensional Hubbard Model
- Stark Ladder in Superlattices
This page was last updated on: 8 June 2004 and
will not be updated. See Top page about my research interests.
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