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Fermiology of new charge-transfer salts, β″-(BEDT-TTF) 4[(H3O)M(C2O4)3]-solvent where M = Ga, Cr and Fe

Coldea, AI, Bangura, AF, Ardavan, A, Singleton, J, Akutsu-Sato, A, Akutsu, H, Turner, SS and Day, P (2004) Fermiology of new charge-transfer salts, β″-(BEDT-TTF) 4[(H3O)M(C2O4)3]-solvent where M = Ga, Cr and Fe Journal De Physique. IV : JP, 114. pp. 205-209.

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Abstract

We report high-field magnetotransport measurements on β″-(BEDT- TTF)4[(H3O)M(C2O4) 3]· solvent, where M=Ga3+, Cr3+ and Fe3+ and solvent=C5H5N. In spite of their differing transition metal-ions, M, the three compounds exhibit similar magnetic quantum oscillation spectra superimposed on a positive magnetoresistance. At least four independent quantum oscillation frequencies have been identified, corresponding to two different hole and electron pockets of the Fermi surface which follow the rules of a compensated metal. Observation of the small pockets could be the result of the Fermi surface reconstruction induced by a possible density wave. The effective masses are very similar for different samples and for different pockets range between meff ≈ 0.5-1.1 me whereas the Dingle temperatures varies between TD ≈ 1.4-4 K. At low temperature, the longitudinal magnetoresistance violates Kohler's rule, suggesting that the interlayer transport in these quasi-2D systems cannot be related to a single scattering time and that the disorder plays an important role. © EDP Sciences.

Item Type: Article
Authors :
NameEmailORCID
Coldea, AIUNSPECIFIEDUNSPECIFIED
Bangura, AFUNSPECIFIEDUNSPECIFIED
Ardavan, AUNSPECIFIEDUNSPECIFIED
Singleton, JUNSPECIFIEDUNSPECIFIED
Akutsu-Sato, AUNSPECIFIEDUNSPECIFIED
Akutsu, HUNSPECIFIEDUNSPECIFIED
Turner, SSs.s.turner@surrey.ac.ukUNSPECIFIED
Day, PUNSPECIFIEDUNSPECIFIED
Date : 1 December 2004
Identification Number : https://doi.org/10.1051/jp4:2004114045
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:03
Last Modified : 17 May 2017 15:08
URI: http://epubs.surrey.ac.uk/id/eprint/837729

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