Eur. Phys. J. B 1, 295-300 (1998)
https://doi.org/10.1007/s100510050185

Characterization of the Fermi surface of the organic superconductor β''-(ET)₂SF₅CH₂CF₂SO₃ by measurements of Shubnikov-de Haas and angle-dependent magnetoresistance oscillations and by electronic band-structure calculations

¹ Physikalisches Institut, Universität Karlsruhe, Engesserstrasse 7, 76128 Karlsruhe, Germany
² Chemistry and Materials Science Divisions, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
³ Department of Chemistry, Portland State University, Portland, Oregon 97207-0751, USA
⁴ Department of Chemistry, North Carolina State University, Raleigh, North Carolina 27695, USA

Corresponding author: ^a Jochen.Wosnitza@physik.uni-karlsruhe.de

Received: 3 March 1997
Revised: 5 November 1997
Revised: 5 May 1997
Accepted: 10 November 1997
Published online: 15 February 1998

Abstract

The electronic structure of the quasi two-dimensional (2D) organic superconductor β''-(ET)₂SF₅CH₂CF₂SO₃ was examined by measuring Shubnikov-de Haas (SdH) and angle-dependent magnetoresistance (AMRO) oscillations and by comparing with electronic band-structure calculations. The SdH oscillation frequencies follow the angular dependence expected for a 2D Fermi surface (FS), and the observed fundamental frequency shows that the 2D FS is 5% of the first Brillouin zone in size. The AMRO data indicate that the shape of the 2D FS is significantly non-circular. The calculated electronic structure has a 2D FS in general agreement with experiment. From the temperature and angular dependence of the SdH amplitude, the cyclotron and band effective masses were estimated to be and , where g is the conduction electron g factor and m_e the free electron mass. The band effective mass is estimated to be from the calculated electronic band structure.