Fyzikální ústav Akademie věd ČR

Seminar Tuesday, 2. March 2010 - 15:00 - 16:00

Speakers: Dr. Tomáš Novotný, Katedra fyziky kondenzovaných látek, MMF UK
Place: Fyzikální ústav AV ČR, Cukrovarnická, knihovna, budova A
Organisers: Department of Thin Films and Nanostructures

We investigate the effects of phonon scattering on the electronic current noise through nanojunctions using the nonequilibrium Green's functions formalism extended to include the counting field. In the case of weak electron-phonon coupling and a single broad electronic level, we derive an analytic expression for the current noise at arbitrary temperature and identify physically distinct contributions based on their voltage dependence. We apply our theory to the experimentally relevant case of a deuterium molecule placed in a break junction and predict a significant inelastic contribution to the current noise. Ref.: Phys. Rev. Lett. 103, 136601 (2009)

Attachments

seminar_-_Novotny.pdf