Evidence for Octupole Order in Ce$_{0.7}$La$_{0.3}$B$_6$ from Resonant X-ray Scattering

Details Evidence for Octupole Order in Ce$_{0.7}$La$_{0.3}$B$_6$ from Resonant X-ray Scattering Evidence for Octupole Order in Ce$_{0.7}$La$_{0.3}$B$_6$ from Resonant X-ray Scattering

2005-09-12

arxiv.org/abs/cond-mat/0509284v2

J. Phys. Soc. Jpn. 74 (2005) 3139

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, 3 tables, in JPSJ format

Scientific paper

10.1143/JPSJ.74.3139

The azimuthal angle dependence observed in the resonant X-ray scattering in phase IV of Ce$_{0.7}$La$_{0.3}$B$_6$ is analyzed theoretically. It is shown that the peculiar angle dependence observed in the E2 channel is consistent with the Gamma_{5u}-type octupole order with principal axis along (111) and equivalent directions. Under the assumption that the four equivalent octupole domains are nearly equally populated in the sample, the observed angle dependences are reproduced by calculation for both sigma-sigma' and sigma-pi' polarizations. The calculation for various symmetries of order parameters excludes unambiguously other order parameters than the Gamma_{5u}-type octupole.

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