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

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

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",

number = "16",

}

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.

UR - https://www.scopus.com/pages/publications/84867756343

U2 - 10.1103/PhysRevLett.109.167003

DO - 10.1103/PhysRevLett.109.167003

M3 - Article

AN - SCOPUS:84867756343

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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