Phonon density of states of LaFeAsO1-xFx

A. D. Christianson; M. D. Lumsden; O. Delaire; M. B. Stone; D. L. Abernathy; M. A. McGuire; A. S. Sefat; R. Jin; B. C. Sales; D. Mandrus; E. D. Mun; P. C. Canfield; J. Y.Y. Lin; M. Lucas; M. Kresch; J. B. Keith; B. Fultz; E. A. Goremychkin; R. J. McQueeney

doi:10.1103/PhysRevLett.101.157004

Phonon density of states of LaFeAsO1-xFx

A. D. Christianson, M. D. Lumsden, O. Delaire, M. B. Stone, D. L. Abernathy, M. A. McGuire, A. S. Sefat, R. Jin, B. C. Sales, D. Mandrus, E. D. Mun, P. C. Canfield, J. Y.Y. Lin, M. Lucas, M. Kresch, J. B. Keith, B. Fultz, E. A. Goremychkin, R. J. McQueeney

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Abstract

We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x∼0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.

Original language	English
Article number	157004
Journal	Physical Review Letters
Volume	101
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.101.157004
State	Published - Oct 8 2008

Funding

Funders	Funder number
Directorate for Mathematical and Physical Sciences	0520547

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Christianson, A. D., Lumsden, M. D., Delaire, O., Stone, M. B., Abernathy, D. L., McGuire, M. A., Sefat, A. S., Jin, R., Sales, B. C., Mandrus, D., Mun, E. D., Canfield, P. C., Lin, J. Y. Y., Lucas, M., Kresch, M., Keith, J. B., Fultz, B., Goremychkin, E. A., & McQueeney, R. J. (2008). Phonon density of states of LaFeAsO1-xFx. Physical Review Letters, 101(15), Article 157004. https://doi.org/10.1103/PhysRevLett.101.157004

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title = "Phonon density of states of LaFeAsO1-xFx",

abstract = "We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x∼0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.",

author = "Christianson, {A. D.} and Lumsden, {M. D.} and O. Delaire and Stone, {M. B.} and Abernathy, {D. L.} and McGuire, {M. A.} and Sefat, {A. S.} and R. Jin and Sales, {B. C.} and D. Mandrus and Mun, {E. D.} and Canfield, {P. C.} and Lin, {J. Y.Y.} and M. Lucas and M. Kresch and Keith, {J. B.} and B. Fultz and Goremychkin, {E. A.} and McQueeney, {R. J.}",

year = "2008",

month = oct,

day = "8",

doi = "10.1103/PhysRevLett.101.157004",

language = "English",

volume = "101",

journal = "Physical Review Letters",

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Christianson, AD , Lumsden, MD, Delaire, O, Stone, MB , Abernathy, DL , McGuire, MA, Sefat, AS, Jin, R, Sales, BC, Mandrus, D, Mun, ED, Canfield, PC, Lin, JYY, Lucas, M, Kresch, M, Keith, JB, Fultz, B, Goremychkin, EA & McQueeney, RJ 2008, 'Phonon density of states of LaFeAsO1-xFx', Physical Review Letters, vol. 101, no. 15, 157004. https://doi.org/10.1103/PhysRevLett.101.157004

TY - JOUR

T1 - Phonon density of states of LaFeAsO1-xFx

AU - Christianson, A. D.

AU - Lumsden, M. D.

AU - Delaire, O.

AU - Stone, M. B.

AU - Abernathy, D. L.

AU - McGuire, M. A.

AU - Sefat, A. S.

AU - Jin, R.

AU - Sales, B. C.

AU - Mandrus, D.

AU - Mun, E. D.

AU - Canfield, P. C.

AU - Lin, J. Y.Y.

AU - Lucas, M.

AU - Kresch, M.

AU - Keith, J. B.

AU - Fultz, B.

AU - Goremychkin, E. A.

AU - McQueeney, R. J.

PY - 2008/10/8

Y1 - 2008/10/8

N2 - We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x∼0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.

AB - We have studied the phonon density of states (PDOS) in LaFeAsO1-xFx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x∼0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.

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U2 - 10.1103/PhysRevLett.101.157004

DO - 10.1103/PhysRevLett.101.157004

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AN - SCOPUS:54049157420

SN - 0031-9007

VL - 101

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

M1 - 157004

ER -

Phonon density of states of LaFeAsO1-xFx

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