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.