project title: Thermoelectric Effects in Mesoscopic N/S Nanosructures
project leader: Dr. Igor Sosnin
access given (in days): 62
access used (in days): 55
local host: Prof. Jukka Pekola
home institution: Royal Holloway University, Physics Dept.
country of institution: UK
starting date (yyyy-mm-dd): 2006-01-01
This project aims at joint experimental studies of thermoelectric effects in mesoscopic structures. The RHUL team has a long experience in this subject, but there are several advantages of doing experiments with the LTL group in Helsinki: 1. Access to appropriate millikelvin measurements. 2. Theoretical support on superconducting proximity effect. 3. New measuring techniques, such as NIS thermometry becomes available. The thermopower of mesoscopic normal metal/superconductor structures at low temperatures is a central topic of this project.
Igor Sosnin and his PhD student Jing Zou visited the LTL in spring 2006. During their visit, they measured a number of samples fabricated at RHUL, studying thermoelectric effects in multiterminal superconducting proximity samples. These measurements were continued later at RHUL. As a result of this collaboration, we published a common paper Jing Zou, Igor Sosnin, Pauli Virtanen, Matthias Meschke, Victor Petrashov, and Tero T. Heikkilä: "Influence of supercurrents on low-temperature thermopower in mesoscopic N/S structures", J. Low Temp. Phys. 146, 193 (2007) [26]. At present, we are preparing another manuscript regarding nonequilibrium-induced phase states in similar structures.