Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2

M. D. Lumsden; A. D. Christianson; D. Parshall; M. B. Stone; S. E. Nagler; G. J. MacDougall; H. A. Mook; K. Lokshin; T. Egami; D. L. Abernathy; E. A. Goremychkin; R. Osborn; M. A. McGuire; A. S. Sefat; R. Jin; B. C. Sales; D. Mandrus

doi:10.1103/PhysRevLett.102.107005

Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2

M. D. Lumsden, A. D. Christianson, D. Parshall, M. B. Stone, S. E. Nagler, G. J. MacDougall, H. A. Mook, K. Lokshin, T. Egami, D. L. Abernathy, E. A. Goremychkin, R. Osborn, M. A. McGuire, A. S. Sefat, R. Jin, B. C. Sales, D. Mandrus

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Abstract

Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below TC, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) kBTC. This is in good agreement with the canonical value of 5 kBTC observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin excitations seen in the undoped parent compounds.

Original language	English
Article number	107005
Journal	Physical Review Letters
Volume	102
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevLett.102.107005
State	Published - Mar 9 2009

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Lumsden, M. D., Christianson, A. D., Parshall, D., Stone, M. B., Nagler, S. E., MacDougall, G. J., Mook, H. A., Lokshin, K., Egami, T., Abernathy, D. L., Goremychkin, E. A., Osborn, R., McGuire, M. A., Sefat, A. S., Jin, R., Sales, B. C., & Mandrus, D. (2009). Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2. Physical Review Letters, 102(10), Article 107005. https://doi.org/10.1103/PhysRevLett.102.107005

@article{11281c897b0e4d58a8f37c4860b9d864,

title = "Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2",

abstract = "Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below TC, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) kBTC. This is in good agreement with the canonical value of 5 kBTC observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin excitations seen in the undoped parent compounds.",

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

year = "2009",

month = mar,

day = "9",

doi = "10.1103/PhysRevLett.102.107005",

language = "English",

volume = "102",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Lumsden, MD , Christianson, AD, Parshall, D, Stone, MB, Nagler, SE, MacDougall, GJ, Mook, HA, Lokshin, K, Egami, T, Abernathy, DL, Goremychkin, EA, Osborn, R, McGuire, MA, Sefat, AS, Jin, R, Sales, BC & Mandrus, D 2009, 'Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2', Physical Review Letters, vol. 102, no. 10, 107005. https://doi.org/10.1103/PhysRevLett.102.107005

TY - JOUR

T1 - Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2

AU - Lumsden, M. D.

AU - Christianson, A. D.

AU - Parshall, D.

AU - Stone, M. B.

AU - Nagler, S. E.

AU - MacDougall, G. J.

AU - Mook, H. A.

AU - Lokshin, K.

AU - Egami, T.

AU - Abernathy, D. L.

AU - Goremychkin, E. A.

AU - Osborn, R.

AU - McGuire, M. A.

AU - Sefat, A. S.

AU - Jin, R.

AU - Sales, B. C.

AU - Mandrus, D.

PY - 2009/3/9

Y1 - 2009/3/9

N2 - Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below TC, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) kBTC. This is in good agreement with the canonical value of 5 kBTC observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin excitations seen in the undoped parent compounds.

AB - Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below TC, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) kBTC. This is in good agreement with the canonical value of 5 kBTC observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin excitations seen in the undoped parent compounds.

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U2 - 10.1103/PhysRevLett.102.107005

DO - 10.1103/PhysRevLett.102.107005

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VL - 102

JO - Physical Review Letters

JF - Physical Review Letters

IS - 10

M1 - 107005

ER -

Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2

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