title: Thermal activation between Landau levels in the organic superconductor beta(")-(BEDT-TTF)2SF5CH2CF2SO3.
abstract: We show that Shubnikov-de Haas oscillations in the interlayer resistivity of the organic superconductor beta(")-(BEDT-TTF)2SF5CH2CF2SO3 become very pronounced in magnetic fields approximately 60 T. The conductivity minima exhibit thermally activated behavior that can be explained simply by the presence of a Landau gap, with the quasi-one-dimensional Fermi surface sheets contributing negligibly to the conductivity. This observation, together with complete suppression of chemical potential oscillations, is consistent with an incommensurate nesting instability of the quasi-one-dimensional sheets.
authors.affiliation: Department of Physics, University of Oxford, Clarendon Laboratory, Parks Road, Oxford OX1 3PU, United Kingdom.
authors.forename: M S
authors.initials: MS
authors.lastname: Nam
authors.forename: A
authors.initials: A
authors.lastname: Ardavan
authors.forename: J A
authors.initials: JA
authors.lastname: Symington
authors.forename: J
authors.initials: J
authors.lastname: Singleton
authors.forename: N
authors.initials: N
authors.lastname: Harrison
authors.forename: C H
authors.initials: CH
authors.lastname: Mielke
authors.forename: J A
authors.initials: JA
authors.lastname: Schlueter
authors.forename: R W
authors.initials: RW
authors.lastname: Winter
authors.forename: G L
authors.initials: GL
authors.lastname: Gard