Influence of Quantum Hall Effect on Linear and Nonlinear Conductivity in the FISDW States of the Organic Conductor (TMTSF)_2PF_6

摘要

We report a detailed characterization of quantum Hall effect (QHE) influenceon the linear and non-linear resistivity tensor in FISDW phases of the organicconductor (TMTSF)2PF6. We show that the behavior at low electric fields,observed for nominally pure single crystals with different values of theresistivity ratio, is fully consistent with a theoretical model, which takesQHE nature of FISDW and residual quasi-particle density associated withdifferent crystal imperfection levels into account. The non-linearity inlongitudinal and diagonal resistivity tensor components observed at largeelectric fields reconciles preceding contradictory results. Our theoreticalmodel offers a qualitatively good explanation of the observed features if asliding of the density wave with the concomitant destruction of QHE, switchedon above a finite electric field, is taken into account.