Realization of Kondo chain in CeCo${}_2$Ga${}_8$

Abstract

We revisited the anisotropy of the heavy-fermion material CeCo${}_2$Ga${}_8$ by measuring the electrical resistivity and magnetic susceptibility along all the principal $\mathbf{a}$-, $\mathbf{b}$- and $\mathbf{c}$-axes. Resistivity along $\mathbf{c}$-axis (${\rho }_c$) shows clear Kondo coherence below about 17 K, while both ${\rho }_a$ and ${\rho }_b$ remain incoherent down to 2 K. The magnetic anisotropy is well understood within the theoretical frame of crystalline electric field effect in combination with magnetic exchange interactions. We found the anisotropy ratio of these magnetic exchange interactions, $|J_{ex}^c/J_{ex}^{a,b}|$, reaches a large value of 4-5. We, therefore, firmly demonstrate that CeCo${}_2$Ga${}_8$ is a quasi-one-dimensional heavy-fermion compound both electrically and magnetically, and thus provide a realistic example of \textit{Kondo chain}.

arXiv comment5 pages, 4 figures, 1 table

References in corpus (15)

• Skyrmion Lattice in a Chiral Magnet
• Quantum Criticality in Heavy Fermion Metals
• Locally critical quantum phase transitions in strongly correlated metals
• The break up of heavy electrons at a quantum critical point
• Quantum criticality
• Magnetic and Thermodynamic Properties of the Collective Paramagnet-Spin Liquid Pyrochlore Tb2Ti2O7
• Destruction of Kondo effect in cubic heavy fermion compound Ce3Pd20Si6
• Ferromagnetic Quantum Criticality in the Quasi-One-Dimensional Heavy Fermion Metal YbNi4P2
• Correlation between the phase diagram and the crystal-field wave functions of CeRh(1-x)Ir(x)In5
• Heavy Fermion Quantum Criticality and Destruction of the Kondo Effect in a Nickel Oxypnictide
• Heavy fermion behavior in the quasi-one-dimensional Kondo lattice CeCo2Ga8
• Pressure-tuned quantum criticality in the antiferromagnetic Kondo semi-metal CeNi${}_{2-\delta }$As${}_2$
• Magnetic property and crystalline electric field effect in ThCr${}_2$Si${}_2$-type CeNi${}_2$As${}_2$
• Interplay between Co-3d and Ce-4f magnetism in CeCoAsO
• Magnetic anisotropy of YbNi4P2

Cited by in corpus (9)

• Anisotropic c-f hybridization in the ferromagnetic quantum critical metal CeRh${}_6$Ge${}_4$
• Quantum Fluctuations in the Non-Fermi Liquid System CeCo${}_2$Ga${}_8$ Investigated Using $\mu$SR
• Neutron-diffraction and linear {Grüneisen} parameter studies of magnetism in NdFe${}_2$Ga${}_8$
• An emerging global picture of heavy fermion physics
• Uniaxial stress effect on the quasi-one-dimensional Kondo lattice CeCo${}_2$Ga${}_8$
• Abnormal planar Hall effect and disentanglement of incoherent and coherent transport in a Kondo lattice
• SU($\mathbf{N}$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order
• Kondo-coupled van der Waals antiferromagnet with high-mobility quasiparticles
• Physical properties of $R$Co${}_2$Al${}_8$ ($R=$ La, Ce, Pr, Nd and Sm) single crystals: An emerging structure-type for anisotropic Kondo lattice studies