Van Lien Nguyen

We don’t have enough information about this author to calculate their statistics. If you think this is an error let us know.
Learn More
The energy band structure of the bilayer graphene superlattices with zero-averaged periodic δ-function potentials are studied within the four-band continuum model. Using the transfer matrix method, the study is mainly focused on examining the touching points between adjacent minibands. For the zero-energy touching points the dispersion relation derived(More)
An alternative model of Gaussian-type potential is suggested, which allows us to describe the transport properties of the locally gated graphene bipolar junctions in all possible charge density regimes, including a smooth transition between the regimes. Using this model we systematically study the transmission probability, the resistances, the(More)
We consider an anisotropically two-dimensional diffusion of a charged molecule (particle) through a large biological channel under an external voltage. The channel is modeled as a cylinder of three structure parameters: radius, length, and surface density of negative charges located at the channel interior-lining. These charges induce inside the channel a(More)
Using the T-matrix approach, we study the effect of a Kronig-Penney periodic potential on the electronic states and the transport properties of graphene. The energy band structure and the group velocity of charge carriers are calculated and discussed in detail for potentials with varying amplitudes and barrier-to-well width ratios. The periodic potential is(More)
We propose a simulation model to study the properties of directed percolation in two-dimensional (2D) anisotropic random media. The degree of anisotropy in the model is given by the ratio μ between the axes of a semiellipse enclosing the bonds that promote percolation in one direction. At percolation, this simple model shows that the average number of bonds(More)
An exact expression of the transmission probability through a finite graphene superlattice with an arbitrary number of potential barriers n is derived in two cases of the periodic potential: rectangular electric potential and δ-function magnetic potential. Obtained transmission probabilities show two types of resonance energy: barrier-induced resonance(More)
  • 1