NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2 (As1-x Px)2

A. P. Dioguardi; T. Kissikov; C. H. Lin; K. R. Shirer; M. M. Lawson; H. J. Grafe; J. H. Chu; I. R. Fisher; R. M. Fernandes; N. J. Curro

doi:10.1103/PhysRevLett.116.107202

NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2 (As1-x Px)2

A. P. Dioguardi, T. Kissikov, C. H. Lin, K. R. Shirer, M. M. Lawson, H. J. Grafe, J. H. Chu, I. R. Fisher, R. M. Fernandes, N. J. Curro

Physics and Astronomy (Twin Cities)

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33 Scopus citations

Abstract

We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations in isovalent P-doped BaFe2As2 single crystals. Both the As75 and P31 sites exhibit a stretched-exponential relaxation similar to the electron-doped systems. By comparing the hyperfine fields and the relaxation rates at these sites we find that the As relaxation cannot be explained solely in terms of magnetic spin fluctuations. We demonstrate that nematic fluctuations couple to the As nuclear quadrupolar moment and can explain the excess relaxation. These results suggest that glassy nematic dynamics are a common phenomenon in the iron-based superconductors.

Original language	English (US)
Article number	107202
Journal	Physical review letters
Volume	116
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.116.107202
State	Published - Mar 10 2016

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title = "NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2 (As1-x Px)2",

abstract = "We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations in isovalent P-doped BaFe2As2 single crystals. Both the As75 and P31 sites exhibit a stretched-exponential relaxation similar to the electron-doped systems. By comparing the hyperfine fields and the relaxation rates at these sites we find that the As relaxation cannot be explained solely in terms of magnetic spin fluctuations. We demonstrate that nematic fluctuations couple to the As nuclear quadrupolar moment and can explain the excess relaxation. These results suggest that glassy nematic dynamics are a common phenomenon in the iron-based superconductors.",

author = "Dioguardi, {A. P.} and T. Kissikov and Lin, {C. H.} and Shirer, {K. R.} and Lawson, {M. M.} and Grafe, {H. J.} and Chu, {J. H.} and Fisher, {I. R.} and Fernandes, {R. M.} and Curro, {N. J.}",

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T1 - NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2 (As1-x Px)2

AU - Dioguardi, A. P.

AU - Kissikov, T.

AU - Lin, C. H.

AU - Shirer, K. R.

AU - Lawson, M. M.

AU - Grafe, H. J.

AU - Chu, J. H.

AU - Fisher, I. R.

AU - Fernandes, R. M.

AU - Curro, N. J.

PY - 2016/3/10

Y1 - 2016/3/10

N2 - We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations in isovalent P-doped BaFe2As2 single crystals. Both the As75 and P31 sites exhibit a stretched-exponential relaxation similar to the electron-doped systems. By comparing the hyperfine fields and the relaxation rates at these sites we find that the As relaxation cannot be explained solely in terms of magnetic spin fluctuations. We demonstrate that nematic fluctuations couple to the As nuclear quadrupolar moment and can explain the excess relaxation. These results suggest that glassy nematic dynamics are a common phenomenon in the iron-based superconductors.

AB - We present evidence for nuclear spin-lattice relaxation driven by glassy nematic fluctuations in isovalent P-doped BaFe2As2 single crystals. Both the As75 and P31 sites exhibit a stretched-exponential relaxation similar to the electron-doped systems. By comparing the hyperfine fields and the relaxation rates at these sites we find that the As relaxation cannot be explained solely in terms of magnetic spin fluctuations. We demonstrate that nematic fluctuations couple to the As nuclear quadrupolar moment and can explain the excess relaxation. These results suggest that glassy nematic dynamics are a common phenomenon in the iron-based superconductors.

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NMR Evidence for Inhomogeneous Nematic Fluctuations in BaFe2 (As1-x Px)2

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