Flat Topological Nodal Lines in Heavy-Fermion Compound CeCoGe${}_3$

Abstract

The interplay between strong electronic correlations, unconventional superconductivity, and symmetry-protected topology provides a fertile ground for discovering exotic quantum states. In this work, we investigate the correlated electronic structure and topological properties of the heavy fermion material CeCoGe${}_3$ using density functional theory combined with dynamical mean-field theory calculations. Our results reveal a crossover from high temperature incoherent states to low temperature coherent heavy quasiparticles, accompanied by a mass enhancement of $m^{\ast }/m_{\text{DFT}}\sim 52.6$ at $T=25$ K. The interplay between electronic correlation, spin-orbit coupling and the noncentrosymmetric $I4mm$ crystal symmetry stabilize flat topological nodal lines within 10 meV of the Fermi level, which could contribute a significant density of states. The proximity of topological nodal lines to the Fermi surface suggests a potential role in mediating pressure induced unconventional superconductivity. Our work establishes CeCoGe${}_3$ as a prototype topological nodal line Kondo semimetal. The coexistence of strong correlation, non-trivial band topology and superconductivity indicate CeCoGe${}_3$ as a potential candidate for realizing topological superconductivity.

References in corpus (44)

• Topological insulators and superconductors
• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl and Dirac Semimetals in Three Dimensional Solids
• WannierTools: An open-source software package for novel topological materials
• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
• Dirac semimetal and topological phase transitions in A3Bi (A=Na, K, Rb)
• Wannier90 as a community code: new features and applications
• Three Dimensional Dirac Semimetal and Quantum Transports in Cd3As2
• Continuous-time Monte Carlo methods for quantum impurity models
• Chiral Anomaly and Classical Negative Magnetoresistance of Weyl Metals
• Beyond Dirac and Weyl fermions: Unconventional quasiparticles in conventional crystals
• Topological response in Weyl semimetals and the chiral anomaly
• Topological Kondo Insulators
• Topological nodal line semimetals
• Quantized circular photogalvanic effect in Weyl semimetals
• Multi-Weyl Topological Semimetals Stabilized by Point Group Symmetry
• Topological Mott Insulators
• Dynamical Mean-Field Theory within the Full-Potential Methods: Electronic structure of Ce-115 materials
• Correlated Topological Insulators with Mixed Valence
• Correlation-driven chiral superconductivity and chiral spin order in doped kagome lattice
• Nature of unconventional pairing in the kagome superconductors AV${}_3$Sb${}_5$
• Exact double-counting in combining the Dynamical Mean Field Theory and the Density Functional Theory
• AV${}_3$Sb${}_5$ Kagome Superconductors: Progress and Future Directions
• Weyl-Kondo Semimetal in Heavy Fermion Systems
• Nonsymmorphic-symmetry-protected hourglass Dirac loop, nodal line, and Dirac point in bulk and monolayer $X_3$SiTe${}_6$ ($X=$ Ta, Nb)
• The alpha-gamma transition of Cerium is entropy-driven
• Magneto-optical conductivity of Weyl semimetals
• Flat bands, strange metals, and the Kondo effect
• Flat bands promoted by Hund's rule coupling in the candidate double-layer high-temperature superconductor La${}_3$Ni${}_2$O${}_7$
• Superconductivity from emerging magnetic moments
• The spectral and magnetic properties of $\alpha$- and $\gamma$-Ce from the Dynamical Mean-Field Theory and Local Density Approximation
• The $\gamma$-$\alpha$ iso-structural Transition in Cerium, a Critical Element
• Plutonium hexaboride is a correlated topological insulator
• Neutron scattering and muon spin relaxation measurements of the non-centrosymmetric antiferromagnet CeCoGe3
• Hunds Rule Theory for Heavy Fermion Superconductors
• From Trivial Kondo Insulator Ce${}_3$Pt${}_3$Bi${}_4$ to Topological Nodal-line Semimetal Ce${}_3$Pd${}_3$Bi${}_4$
• Nodal topological superconductivity in nodal-line semimetals
• ARPES signature of the competition between magnetic order and Kondo effect in CeCoGe3
• Renormalized quasiparticles, topological monopoles and superconducting line nodes in heavy fermion CeTX${}_3$ compounds
• Unraveling the origin of Kondo-like behavior in the 3$d$-electron heavy-fermion compound YFe${}_2$Ge${}_2$
• Fermi surface and mass renormalization in the iron-based superconductor YFe${}_2$Ge${}_2$
• Nodal Nematic Superconductivity in Multiple-Flat-Band Land
• High-Field de Haas-van Alphen Effect in non-centrosymmetric CeCoGe3 and LaCoGe3