Interplay of Kondo Physics with Incommensurate Charge Density Waves in CeTe${}_3$

Abstract

CeTe${}_3$ is a 2--dimensional (2D) Van der Waals (VdW) material with incommensurate charge density waves (CDW), extremely high transition temperature ($T_{CDW}$) and a large momentum--dependent CDW gap that leaves a significant portion of the Fermi surface intact. It is also considered to be a weak Kondo system, a property unexpected for a material with incommensurate CDW, where each atomic site is slightly different. Here, we study the properties of the CDW state in several RTe${}_3$ (R is rare earth) materials and examine the hybridization of itinerant states with the localized Ce $4f$ multiplet in CeTe${}_3$ by using angle resolved photoemission spectroscopy (ARPES). We find that the renormalization of the itinerant states originating from the hybridization with the deeper localized $4f$ states at $-260$ meV is $k-$dependent and extends to the Fermi level. As these localized states are far from the Fermi level, the observed hybridization affects the effective masses only marginally and does not lead to heavy fermions. However, since the same renormalizing mechanism normally leads to the heavy fermion physics when the localized $4f$ states are near the Fermi level, our observation of its strong $k-$dependence suggests that this could be the reason for discrepancy between the heavy masses in specific heat and light ones in Shubnikov de Haas oscillations, often observed in heavy fermions.

8 pages, 3 figures

References in corpus (18)

• ARPES Study of the Evolution of Band Structure and Charge Density Wave Properties in RTe3 for R = Y, La, Ce, Sm, Gd, Tb and Dy
• Quasi-Particle Spectra, Charge-Density-Wave, Superconductivity and Electron-Phonon Coupling in 2H-NbSe2
• Alternative route to charge density wave formation in multiband systems
• Pressure dependence of the charge-density-wave and superconducting states in GdTe${}_3$, TbTe${}_3$ and DyTe${}_3$
• Wave vector dependent electron-phonon coupling drives charge-density-wave formation in TbTe3
• Quasiparticle Interference, quasiparticle interactions and the origin of the charge density-wave in 2H-NbSe${}_2$
• Coexistence and competition of multiple charge-density-wave orders in rare-earth tri-telluride RTe3
• Magnetic field tuned quantum criticality of heavy fermion system YbPtBi
• Charge density wave induced nodal lines in LaTe${}_3$
• Scanning tunneling microscopy study of the CeTe3 charge density wave
• Charge density wave modulation and gap measurements in CeTe${}_3$
• Evidence for nesting driven charge density waves instabilities in a quasi-two-dimensional material: LaAgSb2
• Hierarchical entanglement shells of multichannel Kondo clouds
• Charge Density Waves and the Effects of Uniaxial Strain on the Electronic Structure of 2H-NbSe${}_2$
• Coexistence of Dirac fermion and charge density wave in square-net-based semimetal LaAuSb2
• Observation of momentum-dependent charge density wave gap in a layered antiferromagnet GdTe3
• Revealing Pronounced Electron-Hole Fermi Pockets in the Charge Density Wave Semimetal LaTe3
• Kondo-coupled van der Waals antiferromagnet with high-mobility quasiparticles