Abstract
Magnetoresistance has been studied for quasi-two-dimensional thallium purple bronze T1Mo6017 at a temperature of 4.2 K in fields up to 12 T. Shubnikov-de Haas oscillations are observed. The calculated Fermi surface size is about 5x10(-4) in the high-temperature Brillouin zone and consistent with hidden Fermi surface nesting theory. The field dependence of magnetoresistance is studied in the vicinity of magnetic breakdown. The characteristic field of breakdown is around 0.08 T corresponding to an energy gap of about 2 meV. The effective mobility and cyclotron mass are about 0.025 m(2) V-1 s(-1) and 0.3m(e), respectively.
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