Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 53: Poster Session: Superconductivity 1
TT 53.1: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P2-OG2
Disorder-driven insulating transition in few-layer NbSe2 crystals. — •Nicola Paradiso, Andreas Eller, Tobias Scharff, Sofia Blanter, and Christoph Strunk — Institut für Experimentelle und Angewandte Physik, University of Regensburg
We investigate the impact of disorder on the transport characteristics of few-layer thick crystals of NbSe2. This type II superconducting material is an interesting playground for the study of superconductivity in two dimensions. Recent experiments have demonstrated that in the low-disorder regime superconductivity can be observed even in the single-layer limit. Our measurements go in the opposite direction: we show that in the regime of high disorder a sharp resistance upturn is observed at low temperature. The insulating transition temperature is close to the critical temperature for the superconducting transition of clean NbSe2 crystals. Our results indicate that single crystals behave in a similar way as metal films.