De Haas-van Alphen oscillations in the superconducting fluctuation region of κ-(BEDT-TTF)2Cu(NCS)2

Abstract The de Haas–van Alphen (dHvA) effect and AC susceptibility of the layered organic superconductor κ -(BEDT-TTF) 2 Cu(NCS) 2 have been measured at fields up to 13.6 T, and at temperatures down to 30 mK. The dHvA signal shows a field-dependent damping in the ‘normal’ state which we attribute to superconducting fluctuations. This damping is measured over a wide range of angles, and a simple cos θ scaling behaviour is observed.