Zero-field quantum critical point in Ce0.91Yb0.09CoIn5

We present results of specific heat, electrical resistance, and magnetoresistivity measurements on single crystals of the heavy-fermion superconducting alloy Ce0.91Yb0.09CoIn5. Non-Fermi-liquid to Fermi-liquid crossovers are clearly observed in the temperature dependence of the Sommerfeld coefficien...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B 2018-05, Vol.97 (18)
Main Authors: Singh, Y P, Adhikari, R B, Haney, D J, White, B D, Maple, M B, Dzero, M, Almasan, C C
Format: Article
Language:English
Subjects:
Antiferromagnetism
Critical point
Crossovers
Electrical resistivity
Magnetic fields
Magnetism
Magnetoresistivity
Materials Science
Phase transitions
Physics
Single crystals
Temperature dependence
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present results of specific heat, electrical resistance, and magnetoresistivity measurements on single crystals of the heavy-fermion superconducting alloy Ce0.91Yb0.09CoIn5. Non-Fermi-liquid to Fermi-liquid crossovers are clearly observed in the temperature dependence of the Sommerfeld coefficient γ and resistivity data. Furthermore, we show that the Yb-doped sample with x=0.09 exhibits universality due to an underlying quantum phase transition without an applied magnetic field by utilizing the scaling analysis of γ. Fitting of the heat capacity and resistivity data based on existing theoretical models indicates that the zero-field quantum critical point is of antiferromagnetic origin. Finally, we found that at zero magnetic field the system undergoes a third-order phase transition at the temperature Tc3≈7 K.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.97.184514