2016
DOI: 10.1088/0953-8984/28/37/375601
|View full text |Cite
|
Sign up to set email alerts
|

Tuning the electronic hybridization in the heavy fermion cage compound YbFe2Zn20with Cd doping

Abstract: Abstract.Tuning of the electronic properties of heavy fermion compounds by chemical substitutions provides excellent opportunities to further understand the physics of hybridized ions in crystal lattices. Here we present an investigation on the effects of Cd doping in flux-grown single crystals of the complex intermetallic cage compound YbFe 2 Zn 20 , that has been described as a heavy fermion with Sommerfeld coefficient of 535 mJ/mol.K 2 . Substitution of Cd for Zn disturbs the system by expanding the unit ce… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
5

Citation Types

5
7
0

Year Published

2016
2016
2022
2022

Publication Types

Select...
5
3

Relationship

0
8

Authors

Journals

citations
Cited by 13 publications
(12 citation statements)
references
References 37 publications
5
7
0
Order By: Relevance
“…Ab-initio electronic structure calculations using the structural parameters obtained in this work show several bands crossing the Fermi level and indicate only minor changes in the density of states and band dispersions near the Fermi level under Cd substitution. Taken together with previously reported data [6], our results lead us to conclude that the suppression of the KWR under Cd substitution is not related to significant changes either on the band structure, the Yb valence state or its crystal-field degeneracy, but rather to a modification of the exchange coupling between part the con-duction electrons and the Yb 3+ moments made possible by the site-selectivity of the Cd substitution. This leads to coexisting light and heavy electrons in this system, where the former are responsible for the largely reduced electric resistivity and the latter lead to the persistently large γ-values reported for this system [6].…”
Section: Introductionsupporting
confidence: 88%
See 1 more Smart Citation
“…Ab-initio electronic structure calculations using the structural parameters obtained in this work show several bands crossing the Fermi level and indicate only minor changes in the density of states and band dispersions near the Fermi level under Cd substitution. Taken together with previously reported data [6], our results lead us to conclude that the suppression of the KWR under Cd substitution is not related to significant changes either on the band structure, the Yb valence state or its crystal-field degeneracy, but rather to a modification of the exchange coupling between part the con-duction electrons and the Yb 3+ moments made possible by the site-selectivity of the Cd substitution. This leads to coexisting light and heavy electrons in this system, where the former are responsible for the largely reduced electric resistivity and the latter lead to the persistently large γ-values reported for this system [6].…”
Section: Introductionsupporting
confidence: 88%
“…Taken together with previously reported data [6], our results lead us to conclude that the suppression of the KWR under Cd substitution is not related to significant changes either on the band structure, the Yb valence state or its crystal-field degeneracy, but rather to a modification of the exchange coupling between part the con-duction electrons and the Yb 3+ moments made possible by the site-selectivity of the Cd substitution. This leads to coexisting light and heavy electrons in this system, where the former are responsible for the largely reduced electric resistivity and the latter lead to the persistently large γ-values reported for this system [6]. This system can be thus classified as an effectively quaternary compound, featuring a putative two-component Fermi-liquid with largely different effective masses, for which the KW ratio is no longer a universal quantity.…”
Section: Introductionsupporting
confidence: 88%
“…In the case of YbFe 2 Zn 20 , γ = 520 mJ/mol K 2 , and is thus likely to be further away from a QCP in terms of the Doniach diagram, indeed, a much higher critical pressure, around 10 GPa was proposed in order to reach a QCP 12 . With an effective negative pressure induced by Cd substitution, the hybridization between Yb 3+ 4f electrons in YbFe 2 Zn 20 and the conduction electrons becomes weaker 15 . Apart from pressure induced ordering, metamagnetic transitions were reported for YbCo 2 Zn 20 at high magnetic fields [16][17][18][19] .…”
Section: Introductionmentioning
confidence: 99%
“…On the other hand, it has also been reported that the Zn atoms in YbFe 2 Zn 20 and YMn 2 Zn 20 can be substituted by Cd and In atoms, respectively. For In-substituted YMn 2 Zn 20 , the single-crystal X-ray structure analysis showed that the In atoms preferentially occupy the 16c site, although the Zn atoms at the 96g site are also slightly replaced by the In atoms [17][18][19]. We therefore expected that the Zn atoms at the 16c site in PrT 2 Zn 20 could be replaced by not only Sn atoms but also In atoms.…”
Section: Introductionmentioning
confidence: 98%