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Paper detail

Anisotropic spin-dynamics in the Kondo semiconductor CeRu2Al10

Spin dynamics in the new Kondo insulator compound CeRu2Al10 has been studied using unpolarized and polarized neutron scattering on single crystals. In the unconventional ordered phase forming below T0 = 27.3 K, two excitation branches are observed with significant intensities, the lower one of which has a gap of 4.8 +/- 0.3 meV and a pronounced dispersion up to about 8.5 meV. Comparison with RPA magnon calculations assuming crystal-field and anisotropic exchange couplings captures major aspects of the data, but leaves unexplained discrepancies, pointing to a key role of direction-specific hybridization between 4f and conduction band states in this compound.

preprint2012arXivOpen access
Julien RobertJean-Michel MignotSylvain PetitPaul SteffensTakashi NishiokaRiki KobayashiMasahiro MatsumuraHiroshi TanidaDaiki TanakaMasafumi Sera
cond-mat.str-el
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Julien RobertJean-Michel MignotSylvain PetitPaul SteffensTakashi NishiokaRiki KobayashiMasahiro MatsumuraHiroshi TanidaDaiki TanakaMasafumi Sera

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