Phonon Density of States of LaFeAsO1-xFx

被引：58

作者：

Christianson, A. D. ^{[1
]}

Lumsden, M. D. ^{[1
]}

Delaire, O. ^{[2
]}

Stone, M. B. ^{[1
]}

Abernathy, D. L. ^{[1
]}

McGuire, M. A. ^{[1
]}

Sefat, A. S. ^{[1
]}

Jin, R. ^{[1
]}

Sales, B. C. ^{[1
]}

Mandrus, D. ^{[1
]}

Mun, E. D. ^{[3
,4
]}

Canfield, P. C. ^{[3
,4
]}

Lin, J. Y. Y. ^{[2
]}

Lucas, M. ^{[2
]}

Kresch, M. ^{[2
]}

Keith, J. B. ^{[2
]}

Fultz, B. ^{[2
]}

Goremychkin, E. A. ^{[5
,6
]}

McQueeney, R. J. ^{[3
,4
]}

机构：

[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

[2] CALTECH, W M Keck Lab, Pasadena, CA 91125 USA

[3] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA

[4] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA

[5] Argonne Natl Lab, Argonne, IL 60439 USA

[6] Rutherford Appleton Lab, ISIS Facil, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 15期

关键词：

D O I：

10.1103/PhysRevLett.101.157004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 T-c (x similar to 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.

引用

页数：4

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