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Charge order from orbital-dependent coupling evidenced by NbSe2

Author

Listed:
  • Felix Flicker

    (H. H. Wills Physics Laboratory, University of Bristol)

  • Jasper van Wezel

    (Institute for Theoretical Physics, Institute of Physics, University of Amsterdam)

Abstract

Niobium diselenide has long served as a prototype of two-dimensional charge ordering, believed to arise from an instability of the electronic structure analogous to the one-dimensional Peierls mechanism. Despite this, various anomalous properties have recently been identified experimentally, which cannot be explained by Peierls-like weak-coupling theories. Here, we consider instead a model with strong electron–phonon coupling, taking into account both the full momentum and orbital dependence of the coupling matrix elements. We show that both are necessary for a consistent description of the full range of experimental observations. We argue that NbSe2 is typical in this sense, and that any charge-ordered material in more than one dimension will generically be shaped by the momentum and orbital dependence of its electron–phonon coupling as well as its electronic structure. The consequences will be observable in many charge-ordered materials, including cuprate superconductors.

Suggested Citation

  • Felix Flicker & Jasper van Wezel, 2015. "Charge order from orbital-dependent coupling evidenced by NbSe2," Nature Communications, Nature, vol. 6(1), pages 1-6, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms8034
    DOI: 10.1038/ncomms8034
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    Cited by:

    1. Árpád Pásztor & Alessandro Scarfato & Marcello Spera & Felix Flicker & Céline Barreteau & Enrico Giannini & Jasper van Wezel & Christoph Renner, 2021. "Multiband charge density wave exposed in a transition metal dichalcogenide," Nature Communications, Nature, vol. 12(1), pages 1-6, December.
    2. Xingchen Shen & Rolf Heid & Roland Hott & Amir-Abbas Haghighirad & Björn Salzmann & Marli Reis Cantarino & Claude Monney & Ayman H. Said & Mehdi Frachet & Bridget Murphy & Kai Rossnagel & Stephan Rose, 2023. "Precursor region with full phonon softening above the charge-density-wave phase transition in 2H-TaSe2," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    3. A. Korshunov & H. Hu & D. Subires & Y. Jiang & D. Călugăru & X. Feng & A. Rajapitamahuni & C. Yi & S. Roychowdhury & M. G. Vergniory & J. Strempfer & C. Shekhar & E. Vescovo & D. Chernyshov & A. H. Sa, 2023. "Softening of a flat phonon mode in the kagome ScV6Sn6," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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