Exceptional Heavy-Fermion Semimetals in Three Dimensions
arXiv:2111.03348 · doi:10.1103/PhysRevB.107.035140
Abstract
Topological heavy-fermion systems in three dimensions are usually classified as topological insulators or semimetals. Here, we theoretically predict a different type of heavy-fermion system (dubbed exceptional heavy-fermion semimetal) by studying a three-dimensional periodic Anderson model consisting of strongly correlated localized electrons and itinerant conduction electrons in a zincblende lattice. Due to the breaking of inversion symmetry, the quasiparticle lifetimes at different sublattices are distinct, leading to the emergence of Weyl exceptional rings in the complex pole of the Green's function at finite temperatures; such rings lead to the appearance of bounded Fermi surfaces (bulk Fermi disks). As temperatures rise, two pairs of Weyl exceptional rings merge into two exceptional rings with one bounded bulk Fermi surface (bulk Fermi tube), which are experimentally measurable by angle-resolved photoemission spectroscopy. Finally, we use the dynamical mean field theory to calculate the spectral functions which illustrate the emergence of bulk Fermi tubes. Our work thus opens the door for studying exceptional heavy-fermion semimetal phases in three dimensions.
arXiv comment13 pages, 11 figures, published version
References in corpus (39)
- Topological Insulators in Three Dimensions
- Type-II Weyl Semimetals
- Topological phases of non-Hermitian systems
- Topological Band Theory for Non-Hermitian Hamiltonians
- Topological Kondo Insulators
- Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas
- TRIQS: A Toolbox for Research on Interacting Quantum Systems
- Classification of Exceptional Points and Non-Hermitian Topological Semimetals
- Correlated Topological Insulators with Mixed Valence
- Experimental realization of a Weyl exceptional ring
- Site-selective Mott transition in rare earth nickelates
- Structured Weyl Points in Spin-Orbit Coupled Fermionic Superfluids
- SO(5) Theory of Antiferromagnetism and Superconductivity
- Non-Hermitian perspective of the band structure in heavy-fermion systems
- Exceptional rings in two-dimensional correlated systems with chiral symmetry
- A theory of Topological Kondo Insulators
- Quantum phases driven by strong correlations
- Modeling the Unconventional Superconducting Properties of Expanded AC Fullerides
- Flat Band in Disorder Driven Non-Hermitian Weyl Semimetals
- Non-Hermitian Hopf-Link Exceptional Line Semimetals
- Weyl-Kondo Semimetal in Heavy Fermion Systems
- Exceptional Links and Twisted Fermi Ribbons in non-Hermitian Systems
- Non-Hermitian nodal-line semimetals with an anomalous bulk-boundary correspondence
- Effects of non-Hermitian perturbations on Weyl Hamiltonians with arbitrary topological charges
- Winding Numbers and Generalized Mobility Edges in Non-Hermitian Systems
- Giant spontaneous Hall effect in a nonmagnetic Weyl-Kondo semimetal
- Kondo Insulator to Semimetal Transformation Tuned by Spin-Orbit Coupling
- DMFT reveals the non-Hermitian topology in heavy-fermion systems
- Higher-Order Weyl-Exceptional-Ring Semimetals
- Equivalence of the effective non-hermitian Hamiltonians in the context of open quantum systems and strongly-correlated electron systems
- Chiral-symmetry protected exceptional torus in correlated nodal-line semi-metals
- Relation between exceptional points and the Kondo effect in -electron materials
- Weyl-Kondo semimetals in nonsymmorphic systems
- CeRuSn: a strongly correlated material with nontrivial topology
- Heavy Weyl fermion state in CeRuSn
- Anisotropic optical conductivity of the putative Kondo insulator CeRuSn
- CeRuSn: heavy fermions emerging from a Kondo-insulating state
- Electronic structure of CeRu4Sn6: a density functional plus dynamical mean field theory study
- Equation of Motion Solutions to Hubbard Model retaining Kondo Effect