Dresden 2017 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 2: Superconductivity: Properties and Electronic Structure 1
TT 2.7: Vortrag
Montag, 20. März 2017, 11:30–11:45, HSZ 103
Observation of an anomalous resistive phase in a strained few-layer NbSe2 crystal — •Andreas Eller, Tobias Scharff, Nicola Paradiso, Sofia Blanter, and Christoph Strunk — Universität Regensburg
We report on an anomalous resistive reentrance in a thin exfoliated crystal of NbSe2. While most of the crystal undergoes a superconducting transition at 5.75 K, a strained region in the middle of it displays a resistive transition at around 4 K. The four-terminal resistance saturates at low temperatures. Similarly to the superconducting phase, the resistive phase can be destroyed by applying a magnetic field. At high bias the superconducting phase and the resistive phase show a dual behavior: while the former is quenched by a critical current, the latter is quenched by a critical voltage. Both the critical voltage for the resistive phase and the superconducting current for the superconducting phase display a similar dependence on temperature and magnetic field.