12-15 July 2011
Saint George Hotel
Africa/Johannesburg timezone
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Density-matrix renormalization group study of the electro-absorption in conjugated polymers

Presented by Mr. Anas ABDELWAHAB on 13 Jul 2011 from 11:00 to 11:15
Type: Oral Presentation
Session: Theoretical
Track: Track G - Theoretical and Computational Physics

Content

<p>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, PhD, other)?

M.Sc.

Consider for a student award (Yes / No)?

No

Short Paper

Yes

Place

Location:
Room: Acro5


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