Published in
American Physical Society, Physical Review Letters, 2(100)
DOI: 10.1103/physrevlett.100.026406
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Direct Observation oft2gOrbital Ordering in Magnetite
Journal article published in 2008 by
J. Schlappa,
C. Schüßler-Langeheine,
C. F. Chang 
,
H. Ott,
A. Tanaka,
Z. Hu,
M. W. Haverkort,
E. Schierle,
E. Weschke,
G. Kaindl,
L. H. Tjeng
,
H. Ott,
A. Tanaka,
Z. Hu,
M. W. Haverkort,
E. Schierle,
E. Weschke,
G. Kaindl,
L. H. Tjeng
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Abstract
Using soft-x-ray diffraction at the site-specific resonances in the Fe L2,3 edge, we find clear evidence for orbital and charge ordering in magnetite below the Verwey transition. The spectra show directly that the (001/2) diffraction peak (in cubic notation) is caused by t2g orbital ordering at octahedral Fe2+ sites and the (001) by a spatial modulation of the t2g occupation.