Sliding charge-density-wave in two-dimensional rare-earth tellurides
  Nonlinear transport properties are reported in the layered DyTe$_3$ compound at temperature below the charge-density-wave (CDW) transition, $T_P=302$ K. Conductivity is increasing sharply above the threshold electric field. Under application of a rf field Shapiro steps are clearly observed. These features demonstrate for the first time CDW sliding in two-dimensional compounds. 
A.A. Sinchenko, P. Lejay, P. Monceau
cond-mat.str-el