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Acoustomagnetoelectric Effect in Graphene Nanoribbon in the Presence of External Electric and Magnetic Fields

100%

Dompreh K. A., Mensah S. Y., Abukari S. S., Edziah R., Mensah N. G., Quaye H. A.

Nanoscale Systems: Mathematical Modeling, Theory and Applications

2015

tom 4

nr 1

Acoustomagnetoelectric Effect (AME) in Graphene Nanoribbon (GNR) in the presence of an external electric and magnetic fields was studied using the Boltzmann kinetic equation. On open circuit, the Surface Acoustomagnetoelectric field (ESAME) in GNR was obtained in the region ql >> 1, for energy dispersion "(p) near the Fermi level. The dependence of ESAME on the dimensional factor (ɳ), the sub-band index (pi), and the width (N) of GNR were analyzed numerically. For ESAME versus ɳ, a non-linear graph was obtained. From the graph, at ɳ < 0.62, the obtained graph qualitatively agreed with that experimentally observed in graphite. However at ɳ > 0.62, the ⃗ESAME falls rapidly to a minimum value. We observed that in GNR, the maximum ⃗ESAME was obtained at magnetic field H = 3.2Am−1. The graphs obtainedwere modulated by varying the subband index pi with an inversion observed when pi = 6. The dependence of ESAME on the width N for various pi was also studied where, ⃗ESAME decreases for increase in pi. To enhanced the understanding of ESAME on the N and ɳ, a 3D graph was plotted. This study is relevant for investigating the properties of GNR.

Electronic properties of disclinated nanostructured cylinders

88%

Pincak R., Smotlacha J., Pudlak M.

Nanoscale Systems: Mathematical Modeling, Theory and Applications

2013

tom 2

81-95

The electronic structure of the nanocylinder is investigated. Two cases of this kind of the nanostructure are explored: the defect-free nanocylinder and the nanocylinder whose geometry is perturbed by 2 heptagonal defects lying on the opposite sides. The characteristic quantity which is of our interest is the local density of states. To calculate it, the continuum gauge field-theory model will be used. In this model, the Dirac-like equation is solved on a curved surface. This procedure was used in the earlier papers which were concerned with the changes of the local density of states near the defects. Here, the local density of states is investigated along the whole structure of the nanocylinder.

Ograniczanie wyników

2 Nanoscale Systems: Mathematical Modeling, Theory and Applications

1 Abukari S. S.

1 Dompreh K. A.

1 Edziah R.

1 Mensah N. G.

1 Mensah S. Y.

1 Pincak R.

1 Pudlak M.

1 Quaye H. A.

1 Smotlacha J.

1 2015

1 2013

Wyniki wyszukiwania

Acoustomagnetoelectric Effect in Graphene Nanoribbon in the Presence of External Electric and Magnetic Fields

Electronic properties of disclinated nanostructured cylinders