Anisotropic hybridization in the new Kondo lattice compound CeCoInGa3

Release time:2018-02-11  Hits:

• DOI number:10.1103/PhysRevB.98.115119
• Journal:Physical Review B
• Abstract:We report a detailed and comparative study of the single-crystal CeCoInGa3 in both experiment and theory. Resistivity measurements reveal the typical behavior of a Kondo lattice with the onset temperature of coherence, ��*≈50K. The magnetic specific heat can be well fitted using a spin-fluctuation model at low temperatures, yielding a large Sommerfeld coefficient, ��≈172mJ/mol K2 at 6 K, suggesting that this is a heavy-fermion compound with a pronounced coherence effect. The magnetic susceptibility exhibits a broad field-independent peak at ���� and shows an obvious anisotropy within the ��⁢�� plane, reflecting the anisotropy of the coherence effect at high temperatures. These are compared with strongly correlated calculations combining first-principles band structure calculations and dynamical mean-field theory. Our results confirm the onset of coherence at about 50 K and reveal a similar anisotropy in the hybridization gap, pointing to a close connection between the hybridization strength of the low-temperature Fermi-liquid state and the high-temperature coherence effect.
• Indexed by:Journal paper
• Translation or Not:no
• Date of Publication:2018-01-01
• Links to published journals:https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.115119