Temperature dependence of the Kondo resonance in YbAl3

Tjeng, L. H.; Oh, S.-J.; Cho, E.-J.; Lin, H.-J.; Chen, C. T.; Gweon, G.-H.; Park, J.-H.; Allen, J. W.; Suzuki, T.; Makivić, M. S.; Cox, D. L.

doi:10.1103/PhysRevLett.71.1419

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Temperature dependence of the Kondo resonance in YbAl₃

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Tjeng, L. H., Oh, S.-J., Cho, E.-J., Lin, H.-J., Chen, C. T., Gweon, G.-H., et al. (1993). Temperature dependence of the Kondo resonance in YbAl₃. Physical Review Letters, 71(9), 1419-1422. doi:10.1103/PhysRevLett.71.1419.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-1F4E-3

Abstract

We report the observation of a strong temperature dependence of the Kondo resonance in the valence-band photoemission spectrum and of the 3d --> 4f white line in the x-ray absorption spectrum of YbAl3. The asymmetric Kondo resonance has a binding energy of approximately 35 meV with a approximately 50 meV width. The temperature dependence of the Yb 4f spectral features and valence are well reproduced by Anderson impurity calculations with a Kondo temperature of T(K) almost-equal-to 400 K, demonstrating that both spectroscopic and near ground state properties can be described within a unified theoretical framework.