Motivated by puzzling results of recent experiments, we re-examine the response of a weakly pinned two-dimensional Wigner crystal to a uniform AC electric field. We confirm that at some disorder and magnetic field dependent frequency ω-p$/, an inhomogeneously broadened absorption line emerges. Although the line is conventionally broad in zero magnetic field, in strong fields it appears as a sharp resonance whose width is related to the density of states in the low-frequency tail of the zero-field phonon spectrum. This behavior originates due to the long-range Coulomb interactions.
|Journal De Physique. IV : JP
|Published - 1999
|Proceedings of the 1999 International Workshop on ELectronic Crystals (ECRYS-99) - La Colle-sur-Loup, France
Duration: May 31 1999 → Jun 5 1999
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy