R. B. Lyubovskii, S. I. Pesotskii, R. N. Lyubovskay, E. I. Zhilyaeva, O. A. Bogdanova, “Recovery of the metallic state and quantum oscillations in a dielectric salt of the $\mathrm{(ET)_8[Hg_4X_{12}(C_6H_5Y)_2]}$ family at $\mathrm X=\mathrm Y=\mathrm{Br}$ under compression”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2009, Volume 89, Issue 11,Pages <nobr>685

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CONDENSED MATTER

Recovery of the metallic state and quantum oscillations in a dielectric salt of the $\mathrm{(ET)_8[Hg_4X_{12}(C_6H_5Y)_2]}$ family at $\mathrm X=\mathrm Y=\mathrm{Br}$ under compression

R. B. Lyubovskii^ab, S. I. Pesotskii^ab, R. N. Lyubovskay^a, E. I. Zhilyaeva^a, O. A. Bogdanova^a

^a Institute of Problems of Chemical Physics, Russian Academy of Sciences
^b International Laboratory of High Magnetic Fields and Low Temperature, 53-421 Wroclaw, Poland

Abstract: The quasi-two-dimensional organic conductor (ET)₈[Hg₄Br₁₂(C₆H₅Br)₂] (ET is bis(ethylenedithio)tetrathiafulvalene) undergoes a metal-insulator phase transition at T ~ 170 K. It has been shown that a pressure of 8 kbar suppresses this transition and holds a metallic state to liquid-helium temperatures. Shubnikov—de Haas quantum oscillations with the single frequency F = 215 T have been observed in a magnetic field up to 15 T. The properties of this salt are compared to the properties of the (ET)₈[Hg₄Cl₁₂(C₆H₅Cl)₂] salt of the same family. Time annealing provides an important effect on the conducting properties of the salt under investigation.

PACS: 71.18.+y, 72.20.My

Received: 07.05.2009