Dresden 2006 – wissenschaftliches Programm
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TT: Tiefe Temperaturen
TT 26: Transport - Poster Session
TT 26.39: Poster
Mittwoch, 29. März 2006, 14:30–18:30, P1
Quantum transport through single azobenzene molecules: contact effects — •Miriam del Valle1,2, Rafael Gutiérrez-Laliga2, Carlos Tejedor1, and Gianaurelio Cuniberti2 — 1Dpto. Física de la Materia Condensada, Universidad Autónoma de Madrid, Spain — 2Institute of Theoretical Physics, Universität Regensburg, Germany
We investigate the transport properties of azobenzene, a photo-sensitive molecule which could provide a light-driven switch. The I–V characteristics are studied in the linear response regime using first-principle methods and Green function techniques. Focus is made on the effect of contacts such as gold leads or carbon nanotubes. The trans configuration of this molecule proves to be a better conducting element than its metastable cis configuration. Remarkable is that zigzag carbon nanotubes have a strong effect of enhancement in the current features up to four orders of magnitude.