Phonon scattering and stability of Na_0.5CoO_2

X. N. Zhang; P. Lemmens; V. Gnezdilov; K. Y. Choi; B. Keimer; D. P. Chen; C. T. Lin; F. C. Chou

doi:10.1016/j.physb.2005.01.085

Phonon scattering and stability of Na_0.5CoO_2

Strongly Correlated Electrons 2010-03-09 v1 Materials Science

Authors: X. N. Zhang , P. Lemmens , V. Gnezdilov , K. Y. Choi , B. Keimer , D. P. Chen , C. T. Lin , F. C. Chou

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Abstract

Raman scattering experiments have been performed on Na_xCoO_2 as function of temperature at the composition x=0.5 where a structural instability and a metal-insulator transition have been observed. Three additional phonon modes are observed compared to samples with larger x. An in-situ annealing study (T_max=550 K) with the initial presence of water vapor at ambient conditions reveals an irreversible structural instability of this composition.

Keywords

Raman scattering phonon modes structural instability metal-insulator transition Na_0.5CoO_2

Cite

@article{arxiv.cond-mat/0412656,
  title  = {Phonon scattering and stability of Na_0.5CoO_2},
  author = {X. N. Zhang and P. Lemmens and V. Gnezdilov and K. Y. Choi and B. Keimer and D. P. Chen and C. T. Lin and F. C. Chou},
  journal= {arXiv preprint arXiv:cond-mat/0412656},
  year   = {2010}
}

Comments

2 pages, 2 figures, proceeding of the SCES'04, July 2004, further information see http://www.peter-lemmens.de

Phonon scattering and stability of Na_0.5CoO_2

Abstract

Keywords

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