Pressure-induced anomalous valence crossover in cubic YbCu₅-based compounds.

ABSTRACT: A pressure-induced anomalous valence crossover without structural phase transition is observed in archetypal cubic YbCu₅ based heavy Fermion systems. The Yb valence is found to decrease with increasing pressure, indicating a pressure-induced crossover from a localized 4f ¹³ state to the valence fluctuation regime, which is not expected for Yb systems with conventional c-f hybridization. This result further highlights the remarkable singularity of the valence behavior in compressed YbCu₅-based compounds. The intermetallics Yb₂Pd₂Sn, which shows two quantum critical points (QCP) under pressure and has been proposed as a potential candidate for a reentrant Yb²⁺ state at high pressure, was also studied for comparison. In this co

SUBMITTER: Yamaoka H 

PROVIDER: S-EPMC5517414 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature