English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We consider charge transport through a nanoscopic object, e.g. singlemolecules, short nanotubes, or quantum dots, that is weakly coupled to metallicelectrodes. We account for several levels of the molecule/quantum dot withlevel-dependent coupling strengths, and allow for relaxation of the excitedstates. The current-voltage characteristics as well as the current noise arecalculated within first-order perturbation expansion in the coupling strengths.For the case of asymmetric coupling to the leads we predictnegative-differential-conductance accompanied with super-poissonian noise. Botheffects are destroyed by fast relaxation processes. The non-monotonic behaviorof the shot noise as a function of bias and relaxation rate reflects thedetails of the electronic structure and level-dependent coupling strengths.Comment: 8 pages, 7 figures, submitted to Phys. Rev. B, added reference

Super-Poissonian noise, negative differential conductance, and relaxation effects in transport through molecules, quantum dots, and nanotubes