Evolution of the conductivity of potassium-doped pentacene films

Details Evolution of the conductivity of potassium-doped pentacene films Evolution of the conductivity of potassium-doped pentacene films

2006-03-09

arxiv.org/abs/cond-mat/0603261v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

We have investigated the evolution of the temperature-dependent conductivity of electron-doped pentacene (PEN) thin films, in which the electron density is controlled by means of potassium (K) intercalation. We find that the conductivity is high and exhibit metallic temperature dependence in a broad range of concentrations up to approximately 1 K/PEN. At this value, charge transfer from potassium to PEN saturates, leaving the lowest unoccupied molecular orbital at half filling. This causes a sharp drop of the conductivity, concomitantly with a re-entrance into an insulating state. Our observations are consistent with the occurrence of a Mott-Hubbard insulating state driven by strong electron-electron interaction in agreement with theoretical predictions.

Affiliated with

Also associated with

No associations

Rating

Evolution of the conductivity of potassium-doped pentacene films 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 Evolution of the conductivity of potassium-doped pentacene films, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of the conductivity of potassium-doped pentacene films will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-711522