Anisotropic optical conductivity of the putative Kondo insulator CeRu${}_4$Sn${}_6$

Abstract

Kondo insulators and in particular their non-cubic representatives have remained poorly understood. Here we report on the development of an anisotropic energy pseudogap in the tetragonal compound CeRu${}_4$Sn${}_6$ employing optical reflectivity measurements in broad frequency and temperature ranges, and local density approximation plus dynamical mean field theory calculations. The calculations provide evidence for a Kondo insulator-like response within the $a-a$ plane and a more metallic response along the c axis and qualitatively reproduce the experimental observations, helping to identify their origin.

References in corpus (9)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• Fermi-liquid instabilities at magnetic quantum phase transitions
• Imaging the Fano Lattice to 'Hidden Order' Transition in URu2Si2
• Hastatic Order in URu2Si2
• Thermodynamic and spectral properties of compressed Ce calculated by the merger of the local density approximation and dynamical mean field theory
• Observation of the hybridization gap and Fano resonance in the Kondo lattice URu2Si2
• Evolution of a Large Fermi Surface in the Kondo Lattice
• Dipole matrix element approach vs. Peierls approximation for optical conductivity
• Dynamical mean-field theory for the anisotropic Kondo semiconductor: Temperature and magnetic field dependence

Cited by in corpus (20)

• Weyl-Kondo Semimetal in Heavy Fermion Systems
• Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
• Weyl-Kondo semimetals in nonsymmorphic systems
• CeRu${}_4$Sn${}_6$: a strongly correlated material with nontrivial topology
• Heavy Weyl fermion state in CeRu${}_4$Sn${}_6$
• Route to Topological Superconductivity via Magnetic Field Rotation
• Fully spin-polarized nodal chain state in half metal LiV${}_2$O${}_4$
• Parity-violating hybridization in heavy Weyl semimetals
• Magnetic-field-induced nontrivial electronic state in the Kondo-lattice semimetal CeSb
• Determining the local low-energy excitations in the Kondo semimetal CeRu${}_4$Sn${}_6$ using resonant inelastic x-ray scattering
• Pristine quantum criticality in a Kondo semimetal
• Electronic structure of CeRu4Sn6: a density functional plus dynamical mean field theory study
• Anomalous change of the magnetic moment direction by hole doping in CeRu${}_2$Al${}_{10}$
• Giant isotropic Nernst effect in an anisotropic Kondo semimetal
• Itinerant to relocalized transition of f electrons in the Kondo insulator CeRu4Sn6
• Collapse of the $G{d}^{3+}$ ESR fine structure throughout the coherent temperature of the Gd-doped Kondo Semiconductor $CeF{e}_4{P}_{12}$
• Exceptional Heavy-Fermion Semimetals in Three Dimensions
• f-electron charge densities probed using core level non-resonant inelastic x-ray scattering
• Anisotropic Physical Properties of the Kondo Semimetal CeCu${}_{1.11}$As${}_2$
• Thermal conductivity of the Kondo semiconductor CeRu${}_4$Sn${}_6$