Concepedia

Effects of Nematic Fluctuations on the Elastic Properties of Iron Arsenide Superconductors

Rafael M. Fernandes, Lindsey VanBebber, Sriparna Bhattacharya, P. Chandra, Veerle Keppens, David Mandrus, Michael A. McGuire, B. C. Sales, Athena S. Sefat, Jörg Schmalian

Physical Review Letters · 2010 · 346 citations · 20 references

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Abstract

We demonstrate that the changes in the elastic properties of the FeAs systems, as seen in our resonant ultrasound spectroscopy data, can be naturally understood in terms of fluctuations of emerging nematic degrees of freedom. Both the softening of the lattice in the normal, tetragonal phase as well as its hardening in the superconducting phase are consistently described by our model. Our results confirm the view that structural order is induced by magnetic fluctuations.

References

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Iron-Based Layered Superconductor La[O<sub>1-</sub><i><sub>x</sub></i>F<i><sub>x</sub></i>]FeAs (<i>x</i> = 0.05−0.12) with <i>T</i><sub>c</sub> = 26 K

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Taner Yildirim · Physical Review Letters · 2008 · 512 citations · Full text

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Nematic Electronic Structure in the “Parent” State of the Iron-Based Superconductor Ca(Fe <sub>1–</sub> <i> <sub>x</sub> </i> Co <i> <sub>x</sub> </i> ) <sub>2</sub> As <sub>2</sub>

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