NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1-xCox)2As2

T. Kissikov; A. P. Dioguardi; E. I. Timmons; M. A. Tanatar; R. Prozorov; S. L. Bud'Ko; P. C. Canfield; R. M. Fernandes; N. J. Curro

doi:10.1103/PhysRevB.94.165123

NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1-xCox)2As2

T. Kissikov, A. P. Dioguardi, E. I. Timmons, M. A. Tanatar, R. Prozorov, S. L. Bud'Ko, P. C. Canfield, R. M. Fernandes, N. J. Curro

Physics and Astronomy (Twin Cities)

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15 Scopus citations

Abstract

We report the experimental details of how mechanical detwinning can be implemented in tandem with high-sensitivity nuclear magnetic resonance measurements and use this setup to measure the in-plane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1-xCox)2As2 with x=0.048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.

Original language	English (US)
Article number	165123
Journal	Physical Review B
Volume	94
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevB.94.165123
State	Published - Oct 11 2016

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© 2016 American Physical Society.

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title = "NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1-xCox)2As2",

abstract = "We report the experimental details of how mechanical detwinning can be implemented in tandem with high-sensitivity nuclear magnetic resonance measurements and use this setup to measure the in-plane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1-xCox)2As2 with x=0.048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.",

author = "T. Kissikov and Dioguardi, {A. P.} and Timmons, {E. I.} and Tanatar, {M. A.} and R. Prozorov and Bud'Ko, {S. L.} and Canfield, {P. C.} and Fernandes, {R. M.} and Curro, {N. J.}",

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doi = "10.1103/PhysRevB.94.165123",

language = "English (US)",

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AU - Kissikov, T.

AU - Dioguardi, A. P.

AU - Timmons, E. I.

AU - Tanatar, M. A.

AU - Prozorov, R.

AU - Bud'Ko, S. L.

AU - Canfield, P. C.

AU - Fernandes, R. M.

AU - Curro, N. J.

PY - 2016/10/11

Y1 - 2016/10/11

N2 - We report the experimental details of how mechanical detwinning can be implemented in tandem with high-sensitivity nuclear magnetic resonance measurements and use this setup to measure the in-plane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1-xCox)2As2 with x=0.048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.

AB - We report the experimental details of how mechanical detwinning can be implemented in tandem with high-sensitivity nuclear magnetic resonance measurements and use this setup to measure the in-plane anisotropy of the spin-lattice relaxation rate in underdoped Ba(Fe1-xCox)2As2 with x=0.048. The anisotropy reaches a maximum of 30% at TN, and the recovery data reveal that the glassy behavior of the spin fluctuations present in the twinned state persist in the fully detwinned crystal. A theoretical model is presented to describe the spin-lattice relaxation rate in terms of anisotropic nematic spin fluctuations.

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NMR study of nematic spin fluctuations in a detwinned single crystal of underdoped Ba(Fe1-xCox)2As2

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