12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone

Density-matrix renormalization group study of the electro-absorption in conjugated polymers

13 Jul 2011, 11:00


Oral Presentation Track G - Theoretical and Computational Physics Theoretical


Mr Anas Abdelwahab (Sudan University of Science and Technology)


A symmetrized and dynamical density matrix renormalization group is used to study 1-dimensional extended Peierls-Hubbard model at half-filling. We have investigated the optical conductivity spectrum and electro-absorption spectrum for low-lying optical exciton with strong, intermediate and weak coupling parameter sets for the on-site and neighbor interactions. We were able to capture the Stark effect in the case of strong coupling under static electric field. The intermediate coupling was found to be clear for weak electric field and destroyed for strong one. We were not able to resolve the splitting in the case of weak coupling due to the small binding energy so that small value of electric field could distroy the exciton.

Level (Hons, MSc, <br> &nbsp; PhD, other)? M.Sc.
Consider for a student <br> &nbsp; award (Yes / No)? No
Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)? Yes

Primary author

Mr Anas Abdelwahab (Sudan University of Science and Technology)


Abdel Monim Artoli (Faculty of Science-School of Physics,Al neelain University) Prof. Eric Jeckelmann (Institut für Theoretische Physik, Leibniz Universität Hannover)

Presentation Materials