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Spin waves and revised crystal structure of honeycomb iridate Na2IrO3.

Abstract:

We report inelastic neutron scattering measurements on Na2IrO3, a candidate for the Kitaev spin model on the honeycomb lattice. We observe spin-wave excitations below 5 meV with a dispersion that can be accounted for by including substantial further-neighbor exchanges that stabilize zigzag magnetic order. The onset of long-range magnetic order below T(N)=15.3  K is confirmed via the observation of oscillations in zero-field muon-spin rotation experiments. Combining single-crystal diffraction ...

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Publication status:
Published

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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Condensed Matter Physics
Role:
Author
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Journal:
Physical Review Letters
Volume:
108
Issue:
12
Pages:
127204
Publication date:
2012-03-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Source identifiers:
254318
Language:
English
Keywords:
Pubs id:
pubs:254318
UUID:
uuid:16c7dc16-802e-4f14-af79-558d40e2b218
Local pid:
pubs:254318
Deposit date:
2012-12-19

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