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Comparison of the Fermi-surface topologies of kappa-(BEDT-TTF)_2 Cu(NCS)_2 and its deuterated analogue

(2002)

Authors:

RS Edwards, A Narduzzo, J Singleton, A Ardavan, JA Schlueter
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Comparison of the normal-state properties of κ-(BEDT-TTF)2Cu(NCS)2 and its deuterated analogue in high magnetic fields and under high hydrostatic pressures

Journal of Physics Condensed Matter 14:26 (2002) L495-L502

Authors:

T Biggs, AK Klehe, J Singleton, D Bakker, J Symington, P Goddard, A Ardavan, W Hayes, JA Schlueter, T Sasaki, M Kurmoo

Abstract:

Details of the Fermi-surface topology of deuterated κ(BEDT-TFF)2Cu(NCS)2 (where BEDT-TTF ≡ bis(ethylene-dithio)tetrathiafulvalene) have been measured as a function of pressure, and compared with equivalent measurements of the undeuterated salt. We find that the superconducting transition temperature is much more dramatically suppressed by increasing pressure in the deuterated salt. It is suggested that this is linked to pressure-induced changes in the Fermi-surface topology, which occur more rapidly in the deuterated salt than in the undeuterated salt as the pressure is raised. Our data suggest that the negative isotope effect observed on deuteration is due to small differences in Fermi-surface topology caused by the isotopic substitution.
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HIGH-MAGNETIC-FIELD TESTS FOR REDUCED DIMENSIONALITY IN ORGANIC SUPERCONDUCTORS: JUST HOW VALID ARE THE MOTT-IOFFE-REGEL AND ANDERSON CRITERIA?

World Scientific Publishing (2002) 172-177

Authors:

J SINGLETON, PA GODDARD, A ARDAVAN, N HARRISON, SJ BLUNDELL, JA SCHLUETER, AM KINI
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THE MILLIMETRE-WAVE MAGNETO-OPTICAL RESPONSE OF Sr 2 RuO 4

World Scientific Publishing (2002) 344-349

Authors:

A ARDAVAN, E RZEPNIEWSKI, RS EDWARDS, J SINGLETON, Y MAENO
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Comparison of the normal state properties of $\kappa$-(BEDT-TTF)$_2$Cu(NCS)$_2$ and its deuterated analogue in high magnetic fields and under high hydrostatic pressures

(2002)

Authors:

Tim Biggs, Anne-Katrin Klehe, John Singleton, David Bakker, Jane Symington, Paul Goddard, Arzhang Ardavan, William Hayes, John A Schlueter, Takehiko Sasaki, Mohamedally Kurmoo
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