Photoconductance of organic single-molecule contacts

Details Photoconductance of organic single-molecule contacts Photoconductance of organic single-molecule contacts

2007-04-03

arxiv.org/abs/0704.0408v1

Phys. Rev. B 76, 033403 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevB.76.033403

We study the dc conductance of organic single-molecule contacts in the presence of external electromagnetic radiation (photoconductance). In agreement with previous predictions, we find that the radiation can lead to large enhancements of the conductance of such contacts by bringing off-resonant levels into resonance through photoassisted processes. In our analysis we make use of the simplifying fact that, under certain assumptions, the photoconductance can be expressed in terms of the transmission function in the absence of the radiation. The conductance enhancement is demonstrated for oligophenylene molecules between gold electrodes, whose electronic structure is calculated based on density-functional theory. It is shown that the exponential decay of the conductance with the length of the molecule can be replaced by a length-independent value in the presence of radiation.

Affiliated with

Also associated with

No associations

Rating

Photoconductance of organic single-molecule contacts does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Photoconductance of organic single-molecule contacts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoconductance of organic single-molecule contacts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-256179