Berlin 2018 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 99: Poster Session: Transport

TT 99.45: Poster

Donnerstag, 15. März 2018, 15:00–19:00, Poster B

Josephson junctions induced by strain in an individual few-layer NbSe₂ monocrystal — •Karl Enzo Kloß, Anh-Tuan Nguyen, Sofia Blanter, Paul Linsmaier, Christoph Strunk, and Nicola Paradiso — Institut für experimentelle und angewandte Physik, University of Regensburg

Superconducting transition metal dichalcogenides offer the opportunity to study superconductivity in the limit of clean 2D monocrystals. This opens the way to the study of phenomena that cannot be observed on bulk or disordered samples. One example is the impact of crystal distortions on the local superconducting order parameter. In this work we study the transport characteristics of few-layer NbSe₂ flakes with a crystal fold which divides them in two halves separated by a strained region. This latter may act as a weak link or as a strong barrier, depending on the crystal stress. The weak link corresponds to Josephson junction within the same monocrystal. This is confirmed by our finite-bias measurements in perpendicular field, which reveal a typical Fraunhofer pattern.