Characterization of the Fermi surface of (BEDO-TTF)5[CsHg(SCN)4]2 by magnetoresistance measurements and tight-binding band structure calculations

Rustem B. Lyubovskii, Serguei I. Pesotskii, Marc Gener, Roger Rousseau, Enric Canadell, Jos A.A.J. Perenboom, Victor I. Nizhankovskii, Elena I. Zhilyaeva, Olga A. Bogdanova, Rimma N. Lyubovskaya

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Abstract

Tight-binding band structure calculations as well as magnetoresistance and magnetization measurements were carried out in order to characterize the Fermi surface of the novel organic metal (BEDO-TTF)5[CsHg(SCN)4]2. The tight-binding calculations suggest that the Fermi surface can be described as containing two contributions: a closed two-dimensional portion associated with holes and an open pseudo-one-dimensional portion associated with electrons. Shubnikov-de Haas and de Haas-van Alphen oscillations were observed in magnetic fields of up to 14 T and temperatures of 1.5-4.2 K. Four frequencies (F1 = 650 T, F2 = 2600 T, F3 = 3200 T and F4 = 3850 T) associated with the Shubnikov-de Haas oscillationswere found. The F1 and F4 frequencies are in good agreement with the calculated Fermi surface provided that the possibility of a magnetic breakdown effect is taken into account. It is also suggested that the F2 and F3 frequencies can be understood in the frame of the quantum interference effect.

Original languageEnglish
Pages (from-to)483-488
Number of pages6
JournalJournal of Materials Chemistry
DOIs
Publication statusPublished - 2002

Keywords

  • (BEDO-TTF)[CsHg(SCN)]
  • BEDO-TTF
  • Fermi surface characterization
  • Magnetoresistance
  • Organic metal
  • Tight-binding band structure calculation

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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    Lyubovskii, R. B., Pesotskii, S. I., Gener, M., Rousseau, R., Canadell, E., Perenboom, J. A. A. J., Nizhankovskii, V. I., Zhilyaeva, E. I., Bogdanova, O. A., & Lyubovskaya, R. N. (2002). Characterization of the Fermi surface of (BEDO-TTF)5[CsHg(SCN)4]2 by magnetoresistance measurements and tight-binding band structure calculations. Journal of Materials Chemistry, 483-488. https://doi.org/10.1039/b107223b