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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 of Physics Condensed Matter IOP Publishing 12:40 (2000) l641

Authors:

J Singleton, JA Symington, M-S Nam, A Ardavan, M Kurmoo, P Day
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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 of Physics Condensed Matter 12:40 (2000)

Authors:

J Singleton, JA Symington, MS Nam, A Ardavan, M Kurmoo, P Day

Abstract:

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.
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A Vector Analyzer for Observing Millimeter-Submillimeter Resonances

Institute of Electrical and Electronics Engineers (IEEE) (2000) 1-4

Authors:

P Goy, S Caroopen, M Gross, A Ardavan, R Edwards, E Rzepniewski, J Singleton
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Director fluctuations in a nematic liquid crystal probed using ALC spectroscopy

PHYSICA B 289 (2000) 612-615

Authors:

BW Lovett, JS Stiessberger, SJ Blundell, A Ardavan, IM Marshall, FL Pratt, ID Reid

Abstract:

We have investigated the molecular dynamics in the nematic liquid crystal 5CB using the ALC mu SR technique. Our measurements are consistent with a change in the amplitude of director fluctuations at the nematic-isotropic transition and we develop a model to describe this. (C) 2000 Elsevier Science B.V. All rights reserved.
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Fermi surface spectroscopy: a magnetic resonance approach

PHYSICA B 280:1-4 (2000) 281-282

Authors:

JM Schrama, SO Hill, J Singleton, A Ardavan, E Rzepniewski, R Edwards

Abstract:

We describe recently-developed GHz magneto-optical techniques which measure the Fermi-surface topologies and superconducting order parameter symmetry in organic molecular metals. (C) 2000 Elsevier Science B.V. All rights reserved.
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