Fermi surface study of an organic superconductor θ-(BEDT-TTF)2I3

M. Tamura, The University of Tokyo
H. Kuroda, The University of Tokyo
S. Uji, The University of Tokyo
H. Aoki, The University of Tokyo
M. Tokumoto, The University of Tokyo
A. G. Swanson, The University of Tokyo
J. S. Brooks, The University of Tokyo
C. C. Agosta, The University of Tokyo
S. T. Hannahs, The University of Tokyo

Abstract

The temperature and field dependence of the de Haas-van Alphen oscillations in θ-(BEDT-TTF)2I3 is analyzed. The cyclotron masses are estimated to be 2.0 me and 3.6 me for slow and fast oscillations, respectively. The indication of magnetic breakdown effect is discussed in terms of the geometry of the Fermi surface. The results are compared with those of the infrared reflectance spectra.