The Fermi surface of In5Bi3 from DHVA measurements

De Haas van Alphen data on In5Bi3 single crystals in magnetic fields up to 35 T are presented. A Fermi surface model is proposed based on symmetry considerations, on the angle dependency of the data and on the compensation of electron- and hole-pieces. The model is additionally based on the observation of high effective masses for the dominant pieces of the Fermi surface, indicating a flat character of the corresponding energy bands.