Experimental Evidence for Static Charge Density Waves in Iron Oxypnictides.

@article{Martinelli2016ExperimentalEF,
  title={Experimental Evidence for Static Charge Density Waves in Iron Oxypnictides.},
  author={Alberto Martinelli and Pietro Manfrinetti and Alessia Provino and Alessandro Genovese and Federico Caglieris and G. Lamura and Clemens Ritter and Marina Putti},
  journal={Physical review letters},
  year={2016},
  volume={118 5},
  pages={
          055701
        }
}
In this Letter we report high-resolution synchrotron x-ray powder diffraction and transmission electron microscope analysis of Mn-substituted LaFeAsO samples, demonstrating that a static incommensurate modulated structure develops across the low-temperature orthorhombic phase, whose modulation wave vector depends on the Mn content. The incommensurate structural distortion is likely originating from a charge-density-wave instability, a periodic modulation of the density of conduction electrons… 
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References

SHOWING 1-10 OF 19 REFERENCES

Elucidating Complex Charge Density Wave Structures in Low-Dimensional Materials by Scanning Tunneling Microscopy

An important goal of condensed matter research is to understand how microscopic or atomic level structural and electronic characteristics of a solid determine observable properties like

Stripe Liquid, Crystal, and Glass Phases of Doped Antiferromagnets

A largely descriptive survey is given of the ordered phases of doped antiferromagnets, and of the long wavelength properties that can be derived from an order-parameter theory. In particular, we show

in Stripes

  • and Related Phenomena, edited by A. Bianconi and N. L. Saini
  • 2000

Phys

  • Rev. B 89, 134503
  • 2014

New J

  • Phys. 11, 025011
  • 2009

in Advances in the Crystallographic

  • and Microstructural Analysis of Charge Density Wave Modulated Crystals, edited by F. W. Boswell and J. Craig Bennett
  • 1999

Phys

  • Rev. B 78, 020501 (R)
  • 2008

Supercond

  • Sci. Technol. 14, R1 (2001). PRL 118, 055701
  • 2017

Phys

  • Rev. Lett. 101, 057003
  • 2008