Comparison of the Fermi-surface topologies of -(BEDT-TTF)2Cu(NCS)2 and its deuterated analogue

R S Edwards, Alessandro Narduzzo, J Singleton, A Ardavan, J A Schlueter

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Abstract

We have measured details of the quasi-one-dimensional (Q1D) Fermi-surface sections in the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 and its deuterated analogue using angle-dependent millimetre-wave techniques. There are differences in the corrugations of the Fermi surfaces in the deuterated and undeuterated salts. We suggest that this is important in understanding how deuteration affects the superconducting transition temperature. The data suggest that the 'nestability' of the Q1D Fermi sheets may be important in understanding the 'universal' phase diagram of κ-(BEDT-TTF)2X, in agreement with other recent studies. The experiments also support models for superconductivity which invoke electron–electron interactions depending on the topological properties of the Fermi surface.
Original languageEnglish
Pages (from-to)L483-L490
JournalJournal of Physics-Condensed Matter
Volume15
Issue number31
DOIs
Publication statusPublished - 2003

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Fermi surface
Fermi surfaces
topology
Topology
analogs
Electron-electron interactions
organic superconductors
Superconductivity
Millimeter waves
millimeter waves
Superconducting materials
Superconducting transition temperature
Phase diagrams
electron scattering
superconductivity
Salts
transition temperature
phase diagrams
salts
BEDT-TTF

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Comparison of the Fermi-surface topologies of -(BEDT-TTF)2Cu(NCS)2 and its deuterated analogue. / Edwards, R S; Narduzzo, Alessandro; Singleton, J; Ardavan, A; Schlueter, J A.

In: Journal of Physics-Condensed Matter, Vol. 15, No. 31, 2003, p. L483-L490.

Research output: Contribution to journalArticle

Edwards, R S ; Narduzzo, Alessandro ; Singleton, J ; Ardavan, A ; Schlueter, J A. / Comparison of the Fermi-surface topologies of -(BEDT-TTF)2Cu(NCS)2 and its deuterated analogue. In: Journal of Physics-Condensed Matter. 2003 ; Vol. 15, No. 31. pp. L483-L490.
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