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High energy spin excitations in BaFe2As2

Abstract:
We report neutron scattering measurements of cooperative spin excitations in antiferromagnetically ordered BaFe2As2, the parent phase of an iron pnictide superconductor. The data extend up to ~100meV and show that the spin excitation spectrum is sharp and highly dispersive. By fitting the spectrum to a linear spin-wave model we estimate the magnon bandwidth to be in the region of 0.17eV. The large characteristic spin fluctuation energy suggests that magnetism could play a role in the formation of the superconducting state.
Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.78.220501

Authors


Ewings, RA More by this author
Perring, TG More by this author
Bewley, RI More by this author
Pitcher, MJ More by this author
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Journal:
Phys. Rev. B
Volume:
78
Issue:
22
Pages:
220501
Publication date:
2008-08-21
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:1732db32-3e38-4d9c-b7d5-71403c3b3c63
Source identifiers:
29551
Local pid:
pubs:29551
Language:
English
Keywords:

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