De Haas-van Alphen oscillations are studied for Fermi surfaces (FS) illustrating the model proposed by Pippard in the early sixties, namely the linear chain of orbits coupled by magnetic breakdown. This FS topology is relevant for many multiband quasi-two dimensional (q-2D) organic metals such as κ-(BEDT-TTF)2Cu(NCS)2 and θ-(BEDT-TTF)4CoBr4(C6H4Cl2) which are considered in detail. Whereas the L...

We report the magnetoresistance, magnetothermopower and quantum oscillation study of Sb2Te2Se single crystal. The in-plane transverse magnetoresistance exhibits a crossover at a critical field B∗ from semiclassical weak-field B dependence to the high-field unsaturated linear magnetoresistance which persists up to the room temperature. The low-temperature Seebeck coefficient is negative in zero ...