Eur. Phys. J. B 5, 179-185 (1998)
https://doi.org/10.1007/s100510050432

A new stable organic metal: K-(BETS)₂C(CN)₃. The first K-type radical cation salt with a planar-triangular discrete organic anion

¹ Institute of Solid State Physics, Russian Academy of Sciences, 142432 Chernogolovka, MD, Russia
² Institute of Chemical Physics in Chernogolovka, Russian Academy of Sciences, 142432 Chernogolovka, MD, Russia
³ Walther-Meissner-Institut, Walther-Meissner-Str. 8, 85748 Garching, Germany
⁴ Institut de Ciencia de Materials de Barcelona (CSIC), Campus de la UAB, 08193 Bellaterra, Spain
⁵ Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bonkyo-ku, Tokyo 113, Japan
⁶ Institute for Molecular Science, Okazaki 444, Japan

Corresponding authors: ^a shibaeva@issp.ac.ru - ^b Mark_Kartsovnik@physik.tu-muenchen.de - ^c yagubski@icp.ac.ru - ^d canadell@zas.qf.ub.es

Received: 11 March 1998
Revised: 9 June 1998
Accepted: 11 June 1998
Published online: 15 September 1998

Abstract

The κ-(BETS)₂C(CN)₃ radical cation salt was prepared by electrocrystallization, and its crystal structure was determined by single crystal X-ray diffraction. The electronic structure of κ-(BETS)₂C(CN)₃ was studied by means of the extended Hückel tight binding method. The electrical conductivity of this salt as a function of temperature shows a metallic behaviour down to 1.3 K. Shubnikov-de Haas oscillations reveal both the classical and magnetic breakdown orbits on the Fermi surface typical of the κ-type organic conductors. In addition, a low frequency oscillation (250 T) which is not predicted by the band structure calculations has been found in the oscillation spectrum.