CeRu${}_4$Sn${}_6$: a strongly correlated material with nontrivial topology

Abstract

Topological insulators form a novel state of matter that provides new opportunities to create unique quantum phenomena. While the materials used so far are based on semiconductors, recent theoretical studies predict that also strongly correlated systems can show non-trivial topological properties, thereby allowing even the emergence of surface phenomena that are not possible with topological band insulators. From a practical point of view, it is also expected that strong correlations will reduce the disturbing impact of defects or impurities, and at the same increase the Fermi velocities of the topological surface states. The challenge is now to discover such correlated materials. Here, using advanced x-ray spectroscopies in combination with band structure calculations, we infer that CeRu${}_4$Sn${}_6$ is a strongly correlated material with non-trivial topology.

10 pages, 6 figures, submitted to Scientific Reports

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• Electronic structure of CeRu4Sn6: a density functional plus dynamical mean field theory study

Cited by in corpus (26)

• Weyl-Kondo Semimetal in Heavy Fermion Systems
• Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
• Possible Weyl fermions in the magnetic Kondo system CeSb
• 4$f$ crystal field ground state of the strongly correlated topological insulator SmB${}_6$
• Weyl-Kondo semimetals in nonsymmorphic systems
• Heavy Weyl fermion state in CeRu${}_4$Sn${}_6$
• Direct bulk sensitive probe of 5f symmetry in URu2Si2
• Fully spin-polarized nodal chain state in half metal LiV${}_2$O${}_4$
• Possible devil's staircase in the Kondo lattice CeSbSe
• Similar temperature scale for valence changes in Kondo lattices with different Kondo temperatures
• Spectroscopic evidence of Kondo-induced quasi-quartet in CeRh${}_2$As${}_2$
• Determining the local low-energy excitations in the Kondo semimetal CeRu${}_4$Sn${}_6$ using resonant inelastic x-ray scattering
• Possible multi-orbital ground state in CeCu${}_2$Si${}_2$
• Pristine quantum criticality in a Kondo semimetal
• Topological Phase Transition in an Archetypal f-electron Correlated System: Ce
• Electronic structure of CeRu4Sn6: a density functional plus dynamical mean field theory study
• The quartet ground state in CeB${}_6$: an inelastic x-ray scattering study
• Large Fermi Surface Expansion through Anisotropic c-f Mixing in the Semimetallic Kondo Lattice System CeBi
• Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6
• Kramers' doublet ground state in topological Kondo insulators
• Exceptional Heavy-Fermion Semimetals in Three Dimensions
• Ce 3$p$ hard x-ray photoelectron spectroscopy study of the topological Kondo insulator CeRu${}_4$Sn${}_6$
• Topology of SmB6 revisited by means of topological quantum chemistry
• Correlation Induced Magnetic Topological Phases in Mixed-Valence Compound SmB6
• Foundational aspects of spinor structures and exotic spinors
• The Kondo effect in ferromagnetic quantum critical CeRh${}_6$Ge${}_4$