Detailed Structure of a CDW in a Quenched Random Field

Details Detailed Structure of a CDW in a Quenched Random Field Detailed Structure of a CDW in a Quenched Random Field

1994-11-29

arxiv.org/abs/cond-mat/9411123v1

Physics

Condensed Matter

revtex 3.0, 3 postscript uuencoded figures

Scientific paper

10.1103/PhysRevLett.73.3588

Using high resolution x-ray scattering, we have measured the structure of the Q_1 CDW in Ta-doped NbSe_3. Detailed line shape analysis of the data demonstrates that two length scales are required to describe the phase-phase correlation function. Phase fluctuations with wavelengths less than a new length scale $a$ are suppressed and this $a$ is identified with the amplitude coherence length. We find that xi_a* = 34.4 \pm 10.3 angstroms. Implications for the physical mechanisms responsible for pinning are discussed.

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