Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2007-08-20
Pis'ma ZhETF vol. 86, issue 4, page 290-293 (August 2007)
Physics
Condensed Matter
Strongly Correlated Electrons
4 pages
Scientific paper
10.1134/S0021364007160096
We discuss deformation of quasi 1-dimensional conductors with charge-density wave (CDW) under the electric field deforming the CDW. In case of ``strong'' CDW-lattice interaction the effect can be treated in terms of the converse piezoelectric effect with enormous piezomodulus, $\sim L_c/\lambda$ times larger than that in ionic crystals ($\lambda$ is the CDW wavelength, $L_c$ is the CDW coherence length, mm scale in the sliding state). The CDW-lattice interaction is likely to be defined by the interband charge transfer (rearrangement of the covalent bonds) with lattice deformation, possible in a number of CDW compounds. The resulting effects, observed or expected, are paving a way towards new-principle actuators, including nanosized ones.
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