Shubnikov-de Haas oscillations in an organic conductor tetramethyltetraselenafulvalene-2,5-dimethyl-7,7', 8,8' tetracyanoquinodimethane (TMTSF-DMTCNQ)
- 1 January 1983
- journal article
- Published by EDP Sciences in Journal de Physique Lettres
- Vol. 44 (8), 285-293
- https://doi.org/10.1051/jphyslet:01983004408028500
Abstract
The observation of Shubnikov-de Haas (SdH) oscillations in the metallic, high pressure phase (Metal-II) of TMTSF-DMTCNQ (P > 10 kbar) demonstrates the 3-dimensional, closed nature of the Fermi surface at low temperature (T < 2 K). We observe very small Fermi surface cross-sections of 1.16 x 1017 m-2 and 2.6 x 1017 m-2 in the ab and ac planes respectively. From the field and temperature dependence of the SdH oscillations we extract a cyclotron mass mc/m0 ≃ 0.56 and a Dingle temperature TD = 0.8 K. Finally we discuss the discrepancy between these results and the very high dc conductivity (σ 1.2K ≃ 3 x 105 (Ωcm)-1)Keywords
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