[institut] Podsecanje, danas je SCL seminar (povodom izbora u zvanje), Nikola Prodanovic, petak 24. januar u 14:00

[Nenad Vukmirović]

Поштоване колегинице и колеге,

Подсећам вас да ће се доле најављени семинар одржати данас.

Срдачно,

-- 
Др Ненад Вукмировић,
Виши научни сарадник,
Лабораторија за примену рачунара у науци,
Институт за физику Београд,
Србија.
URL: http://www.scl.rs/nenad

On 01/22/2014 09:03 AM, Nenad Vukmirović wrote:
> Поштоване колегинице и колеге,
>
> Позивам вас на семинар Лабораторије за примену рачунара у науци који ће
> у петак 24. јануара 2014. године у 14:00 у читаоници Института за физику
> одржати Никола Продановић (Лабораторија за примену рачунара у науци,
> Институт за физику Београд). Наслов семинара је:
>
> Electronic transport in colloidal quantum dot supercrystals
>
> Abstract:
>
> Colloidal quantum dot supercrystals are novel nanostructured materials
> which appear very promising in potential optoelectronic applications and
> for fundamental study of electronic transport properties in condensed
> matter physics. Recent fabrication of high quality supercrystals with
> relatively strong inter-site electronic coupling and high size
> monodispersivity enabled high carrier mobilities slightly increasing
> with temperature decreasing. Due to such temperature behaviour it is
> believed that such transport is of metallic kind, so called coherent
> band-like transport.
>
> We developed an accurate model accounting for electron-phonon
> interaction in colloidal quantum dot supercrystals that allowed us to
> identify the nature of charge carriers and the electrical transport
> regime. We find that in experimentally relevant CdSe nanocrystal solids
> the electron-phonon interaction is sufficiently strong that small
> polarons localized to single dots are formed.  Charge-carrier transport
> occurs by small polaron hopping between the dots with mobility that
> decreases with increasing the temperature. While such a temperature
> dependence of mobility is usually considered as a proof of band
> transport,  we show that the same type of dependence occurs in the
> system where transport occurs by small polaron hopping.
>
>
> Срдачан поздрав,
>