Abstract
Shubnikov-de Haas (SdH) and de Haas-van Alphen (dHvA) oscillations spectra of the quasi-two dimensional charge transfer salt β′′-(ET)4(H3O)[ Fe(C2O4)3] .C6H4Cl2 have been investigated in pulsed magnetic fields up to 54 T. The data reveal three basic frequencies Fa, Fb and Fb - a, which can be interpreted on the basis of three compensated closed orbits at low temperature. However a very weak thermal damping of the Fourier component Fb, with the highest amplitude, is evidenced for SdH spectra above about 6 K. As a result, magnetoresistance oscillations are observed at temperatures higher than 30 K. This feature, which is not observed for dHvA oscillations, is in line with quantum interference, pointing to a Fermi surface reconstruction in this compound.
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Vignolles, D., Audouard, A., Laukhin, V. et al. Indications for the coexistence of closed orbit and quantum interferometer with the same cross section in the organic metal β′′-(ET)4(H3O)[ Fe(C2O4)3] .C6H4Cl2: persistence of Shubnikov-de Haas oscillations above 30 K. Eur. Phys. J. B 71, 203–209 (2009). https://doi.org/10.1140/epjb/e2009-00306-1
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DOI: https://doi.org/10.1140/epjb/e2009-00306-1