T. Vuletic et al., Influence of quantum Hall effect on linear and nonlinear conductivity in the FISDW states of the organic conductor (TMTSF)(2)PF6, EUR PHY J B, 21(1), 2001, pp. 53-60
We report a detailed characterization of quantum Hall effect (QHE) influenc
e on the linear and non-linear resistivity tensor in FISDW phases of the or
ganic conductor (TMTSF)(2)PF6. We show that the behavior at low electric fi
elds, observed for nominally pure single-crystals with different values of
the resistivity ratio, is fully consistent with a theoretical model, which
takes QHE nature of FISDW and residual quasi-particle density associated wi
th different crystal imperfection levels into account. The non-linearity in
longitudinal and diagonal resistivity tenser components observed at large
electric fields reconciles preceding contradictory results. Our theoretical
model offers a qualitatively good explanation of the observed features if
a sliding of the density wave with the concomitant destruction of QHE, swit
ched on above a finite electric field, is taken into account.