Dynamics of the Electro-Optic response of Blue Bronze

Details Dynamics of the Electro-Optic response of Blue Bronze Dynamics of the Electro-Optic response of Blue Bronze

2006-05-19

arxiv.org/abs/cond-mat/0605491v2

Physics

Condensed Matter

Strongly Correlated Electrons

36 pages, including 12 figures, submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.74.115104

We have studied the charge density wave (CDW) repolarization dynamics in blue bronze by applying square-wave voltages of different frequencies to the sample and measuring the changes in infrared transmittance, proportional to CDW strain. The frequency dependence of the electro-transmittance was fit to a modified harmonic oscillator response and the evolution of the parameters as functions of voltage, position, and temperature are discussed. Resonant frequencies decrease with distance from the current contacts, indicating that the resulting delays are intrinsic to the CDW with the strain effectively flowing from the contact. For a fixed position, the average relaxation time has a voltage dependence given by tau_0~V^-p, with 1

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