project title: Non-equilibrium effects in mesoscopic structures
project leader: Andrey Zaikin
access given (in days): 31
access used (in days): 20
local host: Jukka Pekola
home institution: University of Karlsruhe and Institute of Nanotechnology
country of institution: Germany
starting date (yyyy-mm-dd): 2006-03-26
Experimental observation of a non-equilibrium energy distribution in a mesoscopic conductor in form of population inversion, has been a challenge for a few years. The LTL researches are addressing this problem by using a hybrid superconductor-normal metal structure, where strong non-equilibrium can be created in principle. This project aims to attack this problem together with the group at Karlsruhe (Zaikin and Dmitri Golubev). These collaborators are well-known experts in non-equilibrium phenomena.
Dr. Golubev participated in the ULTI users' meeting in April 2006 and visited LTL thereafter to discuss possible realizations of the non-equilibrium experiment. Based on these discussions and Golubev's theoretical estimates we have now been experimenting on different realizations of hybrid mesoscopic structures to create population inversion in the conductor. It has turned out that it is most promising to employ a structure where distribution in a superconductor is probed. The experiments on SIS'IS structures are under way.