Giant Kohn anomaly and the phase transition in charge density wave ZrTe_3

Moritz Hoesch; Alexey Bosak; Dmitry Chernyshov; Helmuth Berger; Michael Krisch

doi:10.1103/PhysRevLett.102.086402

Giant Kohn anomaly and the phase transition in charge density wave ZrTe_3

Strongly Correlated Electrons 2009-11-13 v1

Authors: Moritz Hoesch , Alexey Bosak , Dmitry Chernyshov , Helmuth Berger , Michael Krisch

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Abstract

A strong Kohn anomaly in ZrTe_3 is identified in the mostly transverse acoustic phonon branch along the modulation vector q_P with polarization along the a* direction. This soft mode freezes to zero frequency at the transition temperature T_P and the temperature dependence of the frequency is strongly affected by fluctuation effects. Diffuse x-ray scattering of the incommensurate superstructure shows a power law scaling of the intensity and the correlation length that is compatible with an order parameter of dimension n = 2.

Keywords

Kohn anomaly charge density wave ZrTe_3 soft mode phase transition x-ray scattering

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@article{arxiv.0902.0867,
  title  = {Giant Kohn anomaly and the phase transition in charge density wave ZrTe_3},
  author = {Moritz Hoesch and Alexey Bosak and Dmitry Chernyshov and Helmuth Berger and Michael Krisch},
  journal= {arXiv preprint arXiv:0902.0867},
  year   = {2009}
}

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4 pages, 4 figures. accepted at Phys. Rev. Lett

Giant Kohn anomaly and the phase transition in charge density wave ZrTe_3

Abstract

Keywords

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