Quantum galvanomagnetic effects in the organic metal α-(BEDT-TTF)2TlHg(SCN)4

Abstract

The transverse magnetoresistance and Hall effect of the organic metal {alpha}-(BEDT-TTF){sub 2}TlHg(SCN){sub 4} have been studied in static magnetic fields of up to 33 T applied perpendicular to the highly conducting planes. The Hall resistivity is found to exhibit strong oscillations caused by the coexistance of quasi-one-dimensional and quasi-two-dimensional states in the electronic system. In higher quality crystals, plateaulike features appear at magnetic fields above {approximately}30 T, which are consistent with recent claims of the quantum Hall effect in this material. {copyright} {ital 1997} {ital The American Physical Society}