Intermediate Valence State in YbB 4 Revealed byResonant X-ray Emission Spectroscopy

We report the temperature dependence of the Yb valence in the geometrically frustrated compound YbB from 12 to 300 K using resonant X-ray emission spectroscopy at the Yb L transition. We find that the Yb valence, v, is hybridized between the v = 2 and v = 3 valence states, increasing from v = 2.61 ±...

Full description

Saved in:
Bibliographic Details
Published in:Journal of physics. Condensed matter 2022-06
Main Authors: Frontini, Felix Ivo, Lebert, Blair W, Cho, Keunki, Song, M S, Cho, B K, Pollock, Christopher J, Kim, Young-June
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We report the temperature dependence of the Yb valence in the geometrically frustrated compound YbB from 12 to 300 K using resonant X-ray emission spectroscopy at the Yb L transition. We find that the Yb valence, v, is hybridized between the v = 2 and v = 3 valence states, increasing from v = 2.61 ± 0.01 at 12 K to v = 2.67 ± 0.01 at 300 K, confirming that YbB is a Kondo system in the intermediate valence regime. This result indicates that the Kondo interaction in YbB is substantial, and is likely to be the reason why YbB does not order magnetically at low temperature, rather than this being an effect of geometric frustration. Furthermore, the zero-point valence of the system is extracted from our data and compared with other Kondo lattice systems. The zero-point valence seems to be weakly dependent on the Kondo temperature scale, but not on the valence change temperature scale T .
ISSN:1361-648X