Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe2 As2

D. K. Pratt; A. Kreyssig; S. Nandi; N. Ni; A. Thaler; M. D. Lumsden; W. Tian; J. L. Zarestky; S. L. Bud'Ko; P. C. Canfield; A. I. Goldman; R. J. McQueeney

doi:10.1103/PhysRevB.81.140510

Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe₂ As₂

D. K. Pratt, A. Kreyssig, S. Nandi, N. Ni, A. Thaler, M. D. Lumsden, W. Tian, J. L. Zarestky, S. L. Bud'Ko, P. C. Canfield, A. I. Goldman, R. J. McQueeney

Spectroscopy

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Abstract

Inelastic neutron-scattering measurements have been performed on underdoped Ba (Fe_1-xCo_x)₂As₂ (x=4.7%) where superconductivity and long-range antiferromagnetic (AFM) order coexist. The magnetic spectrum found in the normal state is strongly damped and develops into a magnetic resonance feature below Tc that has appreciable dispersion along c axis with a bandwidth of 3-4 meV. This is in contrast to the optimally doped x=8.0% composition, with no long-range AFM order, where the resonance exhibits a much weaker dispersion. [see M. D. Lumsden, Phys. Rev. Lett. 102, 107005 (2009).] The results suggest that the resonance dispersion arises from interlayer spin correlations present in the AFM ordered state.

Original language	English
Article number	140510
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	14
DOIs	https://doi.org/10.1103/PhysRevB.81.140510
State	Published - Apr 29 2010

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Pratt, D. K., Kreyssig, A., Nandi, S., Ni, N., Thaler, A., Lumsden, M. D., Tian, W., Zarestky, J. L., Bud'Ko, S. L., Canfield, P. C., Goldman, A. I., & McQueeney, R. J. (2010). Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe₂ As₂. Physical Review B - Condensed Matter and Materials Physics, 81(14), Article 140510. https://doi.org/10.1103/PhysRevB.81.140510

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title = "Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe2 As2",

abstract = "Inelastic neutron-scattering measurements have been performed on underdoped Ba (Fe1-xCox)2As2 (x=4.7%) where superconductivity and long-range antiferromagnetic (AFM) order coexist. The magnetic spectrum found in the normal state is strongly damped and develops into a magnetic resonance feature below Tc that has appreciable dispersion along c axis with a bandwidth of 3-4 meV. This is in contrast to the optimally doped x=8.0% composition, with no long-range AFM order, where the resonance exhibits a much weaker dispersion. [see M. D. Lumsden, Phys. Rev. Lett. 102, 107005 (2009).] The results suggest that the resonance dispersion arises from interlayer spin correlations present in the AFM ordered state.",

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Pratt, DK, Kreyssig, A, Nandi, S, Ni, N, Thaler, A, Lumsden, MD , Tian, W, Zarestky, JL, Bud'Ko, SL, Canfield, PC, Goldman, AI & McQueeney, RJ 2010, 'Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe₂ As₂', Physical Review B - Condensed Matter and Materials Physics, vol. 81, no. 14, 140510. https://doi.org/10.1103/PhysRevB.81.140510

TY - JOUR

T1 - Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe2 As2

AU - Pratt, D. K.

AU - Kreyssig, A.

AU - Nandi, S.

AU - Ni, N.

AU - Thaler, A.

AU - Lumsden, M. D.

AU - Tian, W.

AU - Zarestky, J. L.

AU - Bud'Ko, S. L.

AU - Canfield, P. C.

AU - Goldman, A. I.

AU - McQueeney, R. J.

PY - 2010/4/29

Y1 - 2010/4/29

N2 - Inelastic neutron-scattering measurements have been performed on underdoped Ba (Fe1-xCox)2As2 (x=4.7%) where superconductivity and long-range antiferromagnetic (AFM) order coexist. The magnetic spectrum found in the normal state is strongly damped and develops into a magnetic resonance feature below Tc that has appreciable dispersion along c axis with a bandwidth of 3-4 meV. This is in contrast to the optimally doped x=8.0% composition, with no long-range AFM order, where the resonance exhibits a much weaker dispersion. [see M. D. Lumsden, Phys. Rev. Lett. 102, 107005 (2009).] The results suggest that the resonance dispersion arises from interlayer spin correlations present in the AFM ordered state.

AB - Inelastic neutron-scattering measurements have been performed on underdoped Ba (Fe1-xCox)2As2 (x=4.7%) where superconductivity and long-range antiferromagnetic (AFM) order coexist. The magnetic spectrum found in the normal state is strongly damped and develops into a magnetic resonance feature below Tc that has appreciable dispersion along c axis with a bandwidth of 3-4 meV. This is in contrast to the optimally doped x=8.0% composition, with no long-range AFM order, where the resonance exhibits a much weaker dispersion. [see M. D. Lumsden, Phys. Rev. Lett. 102, 107005 (2009).] The results suggest that the resonance dispersion arises from interlayer spin correlations present in the AFM ordered state.

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U2 - 10.1103/PhysRevB.81.140510

DO - 10.1103/PhysRevB.81.140510

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VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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M1 - 140510

ER -

Dispersion of the superconducting spin resonance in underdoped and antiferromagnetic BaFe₂ As₂

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