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, and J. Schmalian
Phys. Rev. Lett. 105, 157003 – Published 4 October 2010


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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  • Received 11 November 2009


© 2010 The American Physical Society

Authors & Affiliations

R. M. Fernandes1,*, L. H. VanBebber2, S. Bhattacharya3, P. Chandra4, V. Keppens2, D. Mandrus2,5, M. A. McGuire5, B. C. Sales5, A. S. Sefat5, and J. Schmalian1

  • 1Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
  • 2Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 3Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India and Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
  • 4Department of Physics and Astronomy and Center for Emergent Materials, Rutgers University, Piscataway, New Jersey 08855, USA
  • 5Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

  • *rafaelmf@ameslab.gov

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Vol. 105, Iss. 15 — 8 October 2010

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Heating up of Superconductors
January 27, 2017

This collection marks the 30th anniversary of the discovery of high-temperature superconductors. The papers selected highlight some of the advances that have been made to date, both in understanding why these compounds behave in the way they do, and in utilizing them in applications. The papers included in the collection have been made free to read.

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