Spin excitations in BaFe1.84 Co0.16 As2 superconductor observed by inelastic neutron scattering

D. Parshall; K. A. Lokshin; Jennifer Niedziela; A. D. Christianson; M. D. Lumsden; H. A. Mook; S. E. Nagler; M. A. McGuire; M. B. Stone; D. L. Abernathy; A. S. Sefat; B. C. Sales; D. G. Mandrus; T. Egami

doi:10.1103/PhysRevB.80.012502

Spin excitations in BaFe_1.84 Co_0.16 As₂ superconductor observed by inelastic neutron scattering

D. Parshall, K. A. Lokshin, Jennifer Niedziela, A. D. Christianson, M. D. Lumsden, H. A. Mook, S. E. Nagler, M. A. McGuire, M. B. Stone, D. L. Abernathy, A. S. Sefat, B. C. Sales, D. G. Mandrus, T. Egami

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Abstract

Superconductivity appears to compete against the spin-density wave in Fe pnictides. However, optimally cobalt-doped samples show a quasi-two-dimensional spin excitation centered at the (0.5, 0.5, L) wave vector, "the spin-resonance peak," which is strongly tied to the onset of superconductivity. By inelastic neutron scattering on single crystals we show the similarities and differences of the spin excitations in BaFe1.84 Co0.16 As2 with respect to the spin excitations in the high-temperature superconducting cuprates. As in the cuprates, the resonance occurs as an enhancement to a part of the spin-excitation spectrum, which extends to higher-energy transfer and higher temperature. However, unlike in the cuprates, the resonance peak in this compound is asymmetric in energy.

Original language	English
Article number	012502
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	80
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevB.80.012502
State	Published - Aug 6 2009

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Parshall, D., Lokshin, K. A., Niedziela, J., Christianson, A. D., Lumsden, M. D., Mook, H. A., Nagler, S. E., McGuire, M. A., Stone, M. B., Abernathy, D. L., Sefat, A. S., Sales, B. C., Mandrus, D. G., & Egami, T. (2009). Spin excitations in BaFe_1.84 Co_0.16 As₂ superconductor observed by inelastic neutron scattering. Physical Review B - Condensed Matter and Materials Physics, 80(1), Article 012502. https://doi.org/10.1103/PhysRevB.80.012502

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title = "Spin excitations in BaFe1.84 Co0.16 As2 superconductor observed by inelastic neutron scattering",

abstract = "Superconductivity appears to compete against the spin-density wave in Fe pnictides. However, optimally cobalt-doped samples show a quasi-two-dimensional spin excitation centered at the (0.5, 0.5, L) wave vector, {"}the spin-resonance peak,{"} which is strongly tied to the onset of superconductivity. By inelastic neutron scattering on single crystals we show the similarities and differences of the spin excitations in BaFe1.84 Co0.16 As2 with respect to the spin excitations in the high-temperature superconducting cuprates. As in the cuprates, the resonance occurs as an enhancement to a part of the spin-excitation spectrum, which extends to higher-energy transfer and higher temperature. However, unlike in the cuprates, the resonance peak in this compound is asymmetric in energy.",

author = "D. Parshall and Lokshin, {K. A.} and Jennifer Niedziela and Christianson, {A. D.} and Lumsden, {M. D.} and Mook, {H. A.} and Nagler, {S. E.} and McGuire, {M. A.} and Stone, {M. B.} and Abernathy, {D. L.} and Sefat, {A. S.} and Sales, {B. C.} and Mandrus, {D. G.} and T. Egami",

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doi = "10.1103/PhysRevB.80.012502",

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Parshall, D, Lokshin, KA, Niedziela, J , Christianson, AD , Lumsden, MD, Mook, HA, Nagler, SE, McGuire, MA , Stone, MB , Abernathy, DL, Sefat, AS, Sales, BC, Mandrus, DG & Egami, T 2009, 'Spin excitations in BaFe_1.84 Co_0.16 As₂ superconductor observed by inelastic neutron scattering', Physical Review B - Condensed Matter and Materials Physics, vol. 80, no. 1, 012502. https://doi.org/10.1103/PhysRevB.80.012502

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T1 - Spin excitations in BaFe1.84 Co0.16 As2 superconductor observed by inelastic neutron scattering

AU - Parshall, D.

AU - Lokshin, K. A.

AU - Niedziela, Jennifer

AU - Christianson, A. D.

AU - Lumsden, M. D.

AU - Mook, H. A.

AU - Nagler, S. E.

AU - McGuire, M. A.

AU - Stone, M. B.

AU - Abernathy, D. L.

AU - Sefat, A. S.

AU - Sales, B. C.

AU - Mandrus, D. G.

AU - Egami, T.

PY - 2009/8/6

Y1 - 2009/8/6

N2 - Superconductivity appears to compete against the spin-density wave in Fe pnictides. However, optimally cobalt-doped samples show a quasi-two-dimensional spin excitation centered at the (0.5, 0.5, L) wave vector, "the spin-resonance peak," which is strongly tied to the onset of superconductivity. By inelastic neutron scattering on single crystals we show the similarities and differences of the spin excitations in BaFe1.84 Co0.16 As2 with respect to the spin excitations in the high-temperature superconducting cuprates. As in the cuprates, the resonance occurs as an enhancement to a part of the spin-excitation spectrum, which extends to higher-energy transfer and higher temperature. However, unlike in the cuprates, the resonance peak in this compound is asymmetric in energy.

AB - Superconductivity appears to compete against the spin-density wave in Fe pnictides. However, optimally cobalt-doped samples show a quasi-two-dimensional spin excitation centered at the (0.5, 0.5, L) wave vector, "the spin-resonance peak," which is strongly tied to the onset of superconductivity. By inelastic neutron scattering on single crystals we show the similarities and differences of the spin excitations in BaFe1.84 Co0.16 As2 with respect to the spin excitations in the high-temperature superconducting cuprates. As in the cuprates, the resonance occurs as an enhancement to a part of the spin-excitation spectrum, which extends to higher-energy transfer and higher temperature. However, unlike in the cuprates, the resonance peak in this compound is asymmetric in energy.

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VL - 80

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

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ER -

Spin excitations in BaFe_1.84 Co_0.16 As₂ superconductor observed by inelastic neutron scattering

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