Nonlinear transport properties are reported in the layered DyTe${}_3$ compound at a temperature below the charge-density-wave (CDW) transition $T_P=302$ K. Conductivity increases sharply above the threshold electric field. Under application of a rf field, Shapiro steps are clearly observed. These features demonstrate CDW sliding in two-dimensional compounds.

• Received 30 March 2012

DOI:https://doi.org/10.1103/PhysRevB.85.241104