Excitonic Instability and Pseudogap Formation in Nodal Line Semimetal ZrSiS
arXiv:1712.07916 · doi:10.1103/PhysRevLett.120.216401
Abstract
Electron correlation effects are studied in ZrSiS using a combination of first-principles and model approaches. We show that basic electronic properties of ZrSiS can be described within a two-dimensional lattice model of two nested square lattices. High degree of electron-hole symmetry characteristic for ZrSiS is one of the key features of this model. Having determined model parameters from first-principles calculations, we then explicitly take electron-electron interactions into account and show that at moderately low temperatures ZrSiS exhibits excitonic instability, leading to the formation of a pseudogap in the electronic spectrum. The results can be understood in terms of Coulomb-interaction-assisted pairing of electrons and holes reminiscent to that of an excitonic insulator. Our finding allows us to provide a physical interpretation to the unusual mass enhancement of charge carriers in ZrSiS recently observed experimentally.
6 pages, 4 figures. Final version
References in corpus (9)
- Calculations of Hubbard U from first-principles
- Evidence for a Spin Phase Transition at ν=0 in Bilayer Graphene
- Role of direct exchange and Dzyaloshinskii-Moriya interactions in magnetic properties of graphene derivatives: CF and CH
- Spatially-indirect Exciton Condensate Phases in Double Bilayer Graphene
- Variational approach to the excitonic phase transition in graphene
- Electronic properties of single-layer antimony: Tight-binding model, spin-orbit coupling and the strength of effective Coulomb interactions
- Observation of Effective Pseudospin Scattering in ZrSiS
- Impact of Many-Body Effects on Landau Levels in Graphene
- Quasiparticle Interference in ZrSiS - Strongly Band-Selective Scattering Depending on Impurity Lattice Site
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