Search results

Sort By:

Limit search:

A symmetry based investigation of the band gap of SWCNTs

100%

Pakkhesal M., Ghayour R.

Open Physics

2008

vol. 6

issue 4

824-833

In this paper we use symmetry of Single Walled Carbon Nanotubes (SWCNTs) to generate some types of virtual sub-bands that are lower in number than the real sub-bands obtained through conventional-TB. It is shown that the virtual sub-bands maintain the value of band gap. In obtaining the sub bands, the interactions of the nearest and the second and third-nearest neighbors are taken into account. As the consequence of lower number of sub-bands, a significant reduction in computational effort has occurred and made the approach useful.

Electronic and optical properties of ZnSxSe1âˆ’x alloys

84%

Feng Z., Hu H., Cui S.

Open Physics

2009

vol. 7

issue 2

340-344

A series of calculations from first principles have been carried out to study structural, electronic, and optical properties of ZnSxSe1âˆ’x alloys. Our results show that the lattice constant scales linearly with sulfur composition. The imaginary parts of the dielectric function are calculated, which are in good agreement with the experimental data. We have also interpreted the origin of the spectral peaks on the basis of band structure and density of states. Additionally, we find that no bowing effect in the absorption edge is observed, unlike other II-VI semiconductor alloys.

Refine search results

2 Open Physics

1 2009

1 2008

1 Cui S.

1 Feng Z.

1 Ghayour R.

1 Hu H.

1 Pakkhesal M.

Search results

A symmetry based investigation of the band gap of SWCNTs

Electronic and optical properties of ZnSxSe1âˆ’x alloys