Observation of the Fulde-Ferrell-Larkin-Ovchinnikov state in the quasi-two-dimensional organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 (BEDT-TTF≡bis(ethylene-dithio)tetrathiafulvalene)

Journal article

Single crystals of the quasi-two-dimensional organic type II superconductor, κ-(BEDT-TTF)2Cu(NCS)2, have been studied in magnetic fields of up to 33 T and at temperatures between 0.5 K and 11 K using a compact differential susceptometer. When the magnetic field lies precisely in the quasi-two-dimensional planes of the material, there is strong evidence for a phase transition from the superconducting mixed state into a Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, manifested as a change in the rigidity of the vortex system. The behaviour of the transition as a function of temperature is in good agreement with theoretical predictions.

Authors: Singleton, J; Symington, J; Nam, M; Ardavan, A; Kurmoo, M

• Publisher: IOP
• Journal: Journal of Physics Condensed Matter
• Volume: 12
• Issue: 40
• Publication date: 2000-10-09
• DOI: 10.1088/0953-8984/12/40/102
• ISSN: 0953-8984
• Language: English