Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors

R. M. Fernandes; L. H. Vanbebber; S. Bhattacharya; P. Chandra; V. Keppens; D. Mandrus; M. A. McGuire; B. C. Sales; A. S. Sefat; J. Schmalian

doi:10.1103/PhysRevLett.105.157003

Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors

R. M. Fernandes, L. H. Vanbebber, S. Bhattacharya, P. Chandra, V. Keppens, D. Mandrus, M. A. McGuire, B. C. Sales, A. S. Sefat, J. Schmalian

Correlated Electron Materials

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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.

Original language	English
Article number	157003
Journal	Physical Review Letters
Volume	105
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.105.157003
State	Published - Oct 4 2010

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AU - Chandra, P.

AU - Keppens, V.

AU - Mandrus, D.

AU - McGuire, M. A.

AU - Sales, B. C.

AU - Sefat, A. S.

AU - Schmalian, J.

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AB - 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.

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Effects of nematic fluctuations on the elastic properties of iron arsenide superconductors

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