Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2006-11-08
Physics
Condensed Matter
Strongly Correlated Electrons
accepted for publication in Phys. Rev. B
Scientific paper
The pressure dependence of the interlayer magnetoresistance of the quasi-two dimensional organic metal beta''-(BEDT-TTF)4(NH4)[Fe(C2O4)3].DMF has been investigated up to 1 GPa in pulsed magnetic fields up to 55 T. The Shubnikov-de Haas oscillations spectra can be interpreted on the basis of three compensated orbits in all the pressure range studied, suggesting that the Fermi surface topology remains qualitatively the same as the applied pressure varies. In addition, all the observed frequencies, normalized to their value at ambient pressure, exhibit the same sizeable pressure dependence. Despite this behavior, which is at variance with that of numerous charge transfer salts based on the BEDT-TTF molecule, non-monotonous pressure-induced variations of parameters such as the scattering rate linked to the various detected orbits are observed.
Audouard Alain
Béard Jérome
Canadell Enric
Laukhin Vladimir N.
Nardone Marc
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