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Photoemission study on YbZn1-xSnxCu4

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Utsumi,  Yuki
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Sato, H., Utsumi, Y., Kodama, J., Arita, M., Anzai, H., Mimura, K., et al. (2015). Photoemission study on YbZn1-xSnxCu4. Journal of Physics: Conference Series, 592: 012016, pp. 1-5. doi:10.1088/1742-6596/592/1/012016.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0026-C9BA-4
Abstract
We have investigated the electronic structure of YbZn1-xSnxCu4 with x = 0.5 by means of hard x-ray photoemission spectroscopy (HAXPES) with h nu = 5.95 keV and low photon energy photoemission spectroscopy (LEPES) with h nu = 14 eV. The Yb valence derived from the Yb 3d HAXPES spectrum remarkably decreases between 100 and 20 K; similar to 2.90 at 300 - 100 K and 2.78 at 20 K. The LEPES spectra exhibit a prominent peak near the Fermi level which is attributed to the Kondo resonance peak. The Kondo temperature is estimated to be T-K similar to 210 K from an energy position of the peak extrapolated to zero temperature.