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Magnetic oscillations in β″-(BEDT–TTF)4(NH4)[Fe(C2O4)3]·DMF: Fermi surface study and frequency mixing

✍ Scribed by V.N. Laukhin; A. Audouard; L. Brossard; T.G. Prokhorova; E.B. Yagubskii; E. Canadell

Book ID
103884945
Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
219 KB
Volume
346-347
Category
Article
ISSN
0921-4526

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✦ Synopsis

The interlayer magnetoresistance of the quasi-2D organic superconductor b 00 -ðETÞ 4 ðNH 4 Þ½FeðC 2 O 4 Þ 3 Á DMF has been investigated in pulsed magnetic fields of up to 55 T: According to band structure calculations, the Fermi surface results from the hybridisation of elliptical tubes yielding two compensated electron and hole orbits. Actually, the Fourier spectrum of the oscillatory magnetoresistance exhibits various frequencies which can be regarded as linear combinations of the two frequencies with the highest amplitude ðF a ¼ ð4872Þ T and F b ¼ ð24175Þ TÞ corresponding to 1.2% and 6.0% of the first Brillouin zone area, respectively. The oscillatory spectrum can be accounted for by three compensated electron and hole orbits and combination frequencies typical of coupled orbits networks.

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## Abstract Four (BEDT‐TTF)~4~A[M(C~2~O~4~)~3~]·DMF (DMF = dimethylformamide) salts of the organic donor molecule bis(ethylenedithio)tetrathiafulvalene (BEDT‐TTF) with metal oxalate anions, where A = (NH~4~, K), M = Cr (1); A = NH~4~, M = Fe (2); A = K, M = Cr (3); and A = NH~4~, M = Cr (3′) were p