Magnetization, thermoelectric, and pressure studies of the magnetic field-induced metal to insulator transition in tau phase organic conductors

摘要

We have investigated the magnetic field-induced metal-insulator transition inthe tau-phase organic conductors, which occurs in fields above 35 T, and below14 K, by magnetization, thermoelectric, and pressure dependent transportmethods. Our results show that the transition is a bulk thermodynamic processwhere a magnetic field-dependent gap opens upon entry into the insulatingstate. We argue that the transition involves a magnetic field-induced change inthe electronic structure.