Dynamical Transition in Sliding Chargedensity Waves with Quenched Disorder.pdfVIP

Dynamical Transition in Sliding Charge-density Waves with Quenched Disorder Lee-Wen Chen(1), Leon Balents(2), Matthew P. A. Fisher(2) and M. Cristina Marchetti(1) (1) Department of Physics, Syracuse University (2) Institute for Theoretical Physics, University of California, Santa Barbara (February 1, 2008) We have studied numerically the dynamics of sliding charge-density waves (CDWs) in the presence of impurities in d=1,2. The model considered exhibits a first order dynamical transition at a critical driving force F between “rough” (disorder dominated) (F F ) and “flat” (F F ) sliding phases c c c where disorder is washed out by the external drive. The effective model for the sliding CDWs in the presence of impurities can be mapped onto that of a magnetic flux line pinned by columnar 6 defects and tilted by an applied field. The dynamical transition of sliding CDWs corresponds to the 9 transverse Meissner effect of the tilted flux line. 9 1 PACS numbers: 71.45.Lr, 72.70.+m, 74.60.Ge y a M I. INTRODUCTION phase with quasi-long-range translational order. In two dimensions the moving solid phase is unstable due to the 1 The study of the dynamics of an ordered medium proliferation of phase slips.