ARPES signature of the competition between magnetic order and Kondo effect in CeCoGe3

Abstract

The competition between magnetic order and Kondo effect is essential for the rich physics of heavy fermion systems. Nevertheless, how such competition is manifested in the quasiparticle bands in a real periodic lattice remains elusive in spectroscopic experiments. Here we report a high-resolution photoemission study of the antiferromagnetic Kondo lattice system CeCoGe3 with a high TN1 of 21K. Our measurements reveal a weakly dispersive 4f band at the Fermi level near the Z point, arisingfrom moderate Kondo effect. The intensity of this heavy 4f band exhibits a logarithmic increase with lowering temperature and begins to deviate from this Kondo-like behavior below 25 K, just above TN1, and eventually ceases to grow below 12 K. Our work provides direct spectroscopic evidence for the competition between magnetic order and the Kondo effect in a Kondo lattice system with local-moment antiferromagnetism, indicating a distinct scenario for the microscopic coexistence and competition of these phenomena, which might be related to the real-space modulation.

7 pages, 4 figures

References in corpus (13)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Quantum Criticality in Heavy Fermion Metals
• Hidden Magnetism and Quantum Criticality in the Heavy Fermion Superconductor CeRhIn5
• Fermi-surface collapse and dynamical scaling near a quantum critical point
• High Resolution Photoemission Study on Low-T_K Ce Systems: Kondo Resonance, Crystal Field Structures, and their Temperature Dependence
• Interplay between Kondo effect and Ruderman-Kittel-Kasuya-Yosida interaction
• Anisotropic c-f hybridization in the ferromagnetic quantum critical metal CeRh${}_6$Ge${}_4$
• Revealing the Heavy Quasiparticles in the Heavy-Fermion Superconductor CeCu2Si2
• Kondo Destruction in RKKY-Coupled Kondo Lattice and Multi-Impurity Systems
• Angle-resolved photoemission spectroscopy study of crystal electric field in heavy fermion compound CePt2In7
• Evidence for a hybridization gap in noncentrosymmetric CeRuSi3
• Relaxing Kondo screened Kramers-doublets in CeRhSi${}_3$
• Renormalized quasiparticles, topological monopoles and superconducting line nodes in heavy fermion CeTX${}_3$ compounds

Cited by in corpus (8)

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• Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6
• Relocalization of Uranium 5f Electrons in Antiferromagnetic Heavy Fermion Superconductor UPd${}_2$Al${}_3$: Insights from Angle-Resolved Photoemission Spectroscopy
• Ultrafast Stiffening of the Lattice Potential and Metastable State Formation in 1$T$-TiSe${}_2$
• Missing spectral weight in a heavy-fermion system far above Néel temperature
• Magnon Damping as a Probe of Kondo Coupling in Magnetically Ordered Systems
• Measurements of electronic band structure in CeCoGe${}_3$ by angle-resolved photoemission spectroscopy
• Flat Topological Nodal Lines in Heavy-Fermion Compound CeCoGe${}_3$