Direct Observation of t2g Orbital Ordering in Magnetite

Schlappa, J.; Schüßler-Langeheine, C.; Chang, C. F.; Ott, H.; Tanaka, A.; Hu, Z.; Haverkort, M. W.; Schierle, E.; Weschke, E.; Kaindl, G.; Tjeng, L. H.

doi:10.1103/PhysRevLett.100.026406

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Direct Observation of t_2g Orbital Ordering in Magnetite

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Schlappa, J., Schüßler-Langeheine, C., Chang, C. F., Ott, H., Tanaka, A., Hu, Z., et al. (2008). Direct Observation of t_2g Orbital Ordering in Magnetite. Physical Review Letters, 100(2): 026406, pp. 1-4. doi:10.1103/PhysRevLett.100.026406.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-0F57-E

Abstract

Using soft-x-ray diffraction at the site-specific resonances in the Fe L(2,3) 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 t(2g) orbital ordering at octahedral Fe(2+) sites and the (001) by a spatial modulation of the t(2g) occupation.