8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

Analysis of electron diffraction patterns in DCNQI salts

9 Jul 2013, 17:40
1h
Poster Presentation Track C - Photonics Poster1

Speaker

Mr Olufemi Opeyemi Olaoye (SU)

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Abstract content <br> &nbsp; (Max 300 words)

We investigate a donor-acceptor quasi 1D organic molecular crystal, Cu [R1, R2 – DCNQI]2 (R1 and R2 are radicals), using ultrafast electron diffraction technique. These crystals are radical anion salts and are famous for their high anisotropic electric conductivities and their low temperature Peierl’s transition from metal to insulator, with up to eight orders of magnitude conductivity change, depending on the radical used. The signature of the intensity distribution of the {h0l} Bragg reflections along the [010] Laue zone is analysed and compared with the theoretical simulation. The formation and dynamics of 3-fold periodicity charge density wave (CDW) in these crystals, which are mediated by d-p-π hybridization and the coordination angle α (N-Cu-N angle), forms an on-going research in our laboratory. The ultimate aim of the project is to study the photo-induced Peierl’s transition with sub-picosecond temporal resolution by means of ultrafast electron diffraction. The poster will present the theoretical background of the project, and highlight the subtle and difficult analysis of our transient diffraction patterns.

Main supervisor (name and email)<br>and his / her institution

HEINRICH SCHWOERER,
heso@sun.ac.za,
Stellenbosch University

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

YES

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

NO

Primary author

Co-authors

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