Dresden 2017 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 56: Poster Session: Low-Dimensional Systems

TT 56.16: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P2-OG4

Magnetotransport properties of the organic superconductor κ-(ET)₂Cu[N(CN)₂)]Cl near the Mott-insulating transition — •Sebastian Oberbauer^1,2, Michael Kunz¹, Werner Biberacher¹, Natalia D. Kushch³, and Mark V. Kartsovnik¹ — ¹Walther-Meißner-Institut, Garching, Germany — ²Technische Universität München, Garching, Germany — ³Institute of Problems of Chemical Physics, Chernogolovka, Russia

κ-(BEDT-TTF)₂Cu[N(CN)₂)]Cl belongs to the family of charge transfer salts and shows many interesting phenomena at low temperatures. Especially the existence of a superconducting phase at temperatures up to 12.8 K bordering a magnetically ordered Mott-insulating state are of big interest in current research. This metal-insulator transition (MIT) can be tuned by applying hydrostatic pressures ≤ 0.4 kbar. Together with its highly anisotropic conductivity, this makes the compound a model example of a quasi-two-dimensional correlated electronic system.

Here we report on a magnetotransport study of κ-(BEDT-TTF)₂Cu[N(CN)₂)]Cl under pressure, in the vicinity of the MIT. A particular focus is put on tracing the behavior of Shubnikov - de Haas oscillations. While the oscillation frequencies only weakly change with pressure, the effective cyclotron masses exhibit a significant increase, accelerating towards the MIT. We compare the experimental data with those obtained on similar κ-type organic conductors and with theoretical predictions.