Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe 2As 2 by elastic and inelastic neutron scattering

M. G. Kim; J. Lamsal; T. W. Heitmann; G. S. Tucker; D. K. Pratt; S. N. Khan; Y. B. Lee; A. Alam; A. Thaler; N. Ni; S. Ran; S. L. Bud'Ko; K. J. Marty; M. D. Lumsden; P. C. Canfield; B. N. Harmon; D. D. Johnson; A. Kreyssig; R. J. McQueeney; A. I. Goldman

doi:10.1103/PhysRevLett.109.167003

Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe ₂As ₂ by elastic and inelastic neutron scattering

M. G. Kim, J. Lamsal, T. W. Heitmann, G. S. Tucker, D. K. Pratt, S. N. Khan, Y. B. Lee, A. Alam, A. Thaler, N. Ni, S. Ran, S. L. Bud'Ko, K. J. Marty, M. D. Lumsden, P. C. Canfield, B. N. Harmon, D. D. Johnson, A. Kreyssig, R. J. McQueeney, A. I. Goldman

Spectroscopy

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Abstract

The spin fluctuation spectra from nonsuperconducting Cu-substituted, and superconducting Co-substituted, BaFe ₂As ₂ are compared quantitatively by inelastic neutron scattering measurements and are found to be indistinguishable. Whereas diffraction studies show the appearance of incommensurate spin-density wave order in Co and Ni substituted samples, the magnetic phase diagram for Cu substitution does not display incommensurate order, demonstrating that simple electron counting based on rigid-band concepts is invalid. These results, supported by theoretical calculations, suggest that substitutional impurity effects in the Fe plane play a significant role in controlling magnetism and the appearance of superconductivity, with Cu distinguished by enhanced impurity scattering and split-band behavior.

Original language	English
Article number	167003
Journal	Physical Review Letters
Volume	109
Issue number	16
DOIs	https://doi.org/10.1103/PhysRevLett.109.167003
State	Published - Oct 19 2012

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Kim, M. G., Lamsal, J., Heitmann, T. W., Tucker, G. S., Pratt, D. K., Khan, S. N., Lee, Y. B., Alam, A., Thaler, A., Ni, N., Ran, S., Bud'Ko, S. L., Marty, K. J., Lumsden, M. D., Canfield, P. C., Harmon, B. N., Johnson, D. D., Kreyssig, A., McQueeney, R. J., & Goldman, A. I. (2012). Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe ₂As ₂ by elastic and inelastic neutron scattering. Physical Review Letters, 109(16), Article 167003. https://doi.org/10.1103/PhysRevLett.109.167003

@article{b056382b2e9f4340a5fe3a1b77f3b500,

title = "Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe 2As 2 by elastic and inelastic neutron scattering",

abstract = "The spin fluctuation spectra from nonsuperconducting Cu-substituted, and superconducting Co-substituted, BaFe 2As 2 are compared quantitatively by inelastic neutron scattering measurements and are found to be indistinguishable. Whereas diffraction studies show the appearance of incommensurate spin-density wave order in Co and Ni substituted samples, the magnetic phase diagram for Cu substitution does not display incommensurate order, demonstrating that simple electron counting based on rigid-band concepts is invalid. These results, supported by theoretical calculations, suggest that substitutional impurity effects in the Fe plane play a significant role in controlling magnetism and the appearance of superconductivity, with Cu distinguished by enhanced impurity scattering and split-band behavior.",

author = "Kim, {M. G.} and J. Lamsal and Heitmann, {T. W.} and Tucker, {G. S.} and Pratt, {D. K.} and Khan, {S. N.} and Lee, {Y. B.} and A. Alam and A. Thaler and N. Ni and S. Ran and Bud'Ko, {S. L.} and Marty, {K. J.} and Lumsden, {M. D.} and Canfield, {P. C.} and Harmon, {B. N.} and Johnson, {D. D.} and A. Kreyssig and McQueeney, {R. J.} and Goldman, {A. I.}",

year = "2012",

month = oct,

day = "19",

doi = "10.1103/PhysRevLett.109.167003",

language = "English",

volume = "109",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Kim, MG, Lamsal, J, Heitmann, TW, Tucker, GS, Pratt, DK, Khan, SN, Lee, YB, Alam, A, Thaler, A, Ni, N, Ran, S, Bud'Ko, SL, Marty, KJ, Lumsden, MD, Canfield, PC, Harmon, BN, Johnson, DD, Kreyssig, A, McQueeney, RJ & Goldman, AI 2012, 'Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe ₂As ₂ by elastic and inelastic neutron scattering', Physical Review Letters, vol. 109, no. 16, 167003. https://doi.org/10.1103/PhysRevLett.109.167003

TY - JOUR

T1 - Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe 2As 2 by elastic and inelastic neutron scattering

AU - Kim, M. G.

AU - Lamsal, J.

AU - Heitmann, T. W.

AU - Tucker, G. S.

AU - Pratt, D. K.

AU - Khan, S. N.

AU - Lee, Y. B.

AU - Alam, A.

AU - Thaler, A.

AU - Ni, N.

AU - Ran, S.

AU - Bud'Ko, S. L.

AU - Marty, K. J.

AU - Lumsden, M. D.

AU - Canfield, P. C.

AU - Harmon, B. N.

AU - Johnson, D. D.

AU - Kreyssig, A.

AU - McQueeney, R. J.

AU - Goldman, A. I.

PY - 2012/10/19

Y1 - 2012/10/19

N2 - The spin fluctuation spectra from nonsuperconducting Cu-substituted, and superconducting Co-substituted, BaFe 2As 2 are compared quantitatively by inelastic neutron scattering measurements and are found to be indistinguishable. Whereas diffraction studies show the appearance of incommensurate spin-density wave order in Co and Ni substituted samples, the magnetic phase diagram for Cu substitution does not display incommensurate order, demonstrating that simple electron counting based on rigid-band concepts is invalid. These results, supported by theoretical calculations, suggest that substitutional impurity effects in the Fe plane play a significant role in controlling magnetism and the appearance of superconductivity, with Cu distinguished by enhanced impurity scattering and split-band behavior.

AB - The spin fluctuation spectra from nonsuperconducting Cu-substituted, and superconducting Co-substituted, BaFe 2As 2 are compared quantitatively by inelastic neutron scattering measurements and are found to be indistinguishable. Whereas diffraction studies show the appearance of incommensurate spin-density wave order in Co and Ni substituted samples, the magnetic phase diagram for Cu substitution does not display incommensurate order, demonstrating that simple electron counting based on rigid-band concepts is invalid. These results, supported by theoretical calculations, suggest that substitutional impurity effects in the Fe plane play a significant role in controlling magnetism and the appearance of superconductivity, with Cu distinguished by enhanced impurity scattering and split-band behavior.

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DO - 10.1103/PhysRevLett.109.167003

M3 - Article

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SN - 0031-9007

VL - 109

JO - Physical Review Letters

JF - Physical Review Letters

IS - 16

M1 - 167003

ER -

Effects of transition metal substitutions on the incommensurability and spin fluctuations in BaFe ₂As ₂ by elastic and inelastic neutron scattering

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