Low-energy electrodynamics of Dirac semimetal phases in the doped Mott insulator SrIrO
arXiv:2101.06109 · doi:10.1103/PhysRevB.103.045116
Abstract
Correlated Dirac semimetal phases emerge in lightly doped (Tb- or La-doped) Mott insulator SrIrO, where a d-wave symmetry-breaking order underlying a pseudogap plays a crucial role in determining the nature of Dirac degeneracy, i.e., whether it is a Dirac line node or Dirac point node. Here, using a realistic five-orbital tight-binding model with a Hubbard U and a semiclassical Boltzmann transport theory, we systematically study the low-energy electrodynamic properties of the Dirac semimetal phases in the paramagnetic lightly doped SrIrO. We investigate the effects of the d-wave electronic order and electron doping concentration on the electronic band structures and optical properties of various Dirac semimetal phases. We calculate the intraband optical conductivity and obtain electrodynamic parameters of dc conductivity, scattering rate, and Drude weight for three Dirac semimetal phases: two are Dirac point-node states observed in the 3% Tb-doped and 5% La-doped SrIrO, and the other is a Dirac line-node state. Our results show that the temperature dependence of the electrodynamic parameters is strong in the Tb-doped system while weak in the La-doped and Dirac line-node systems, which are consistent with available experimental data. Moreover, using the low-energy effective theory, we also compare the temperature-dependent screening effect in the Tb- and La-doped systems using graphene as a reference. Our paper provides valuable insight for understanding the transport and optical properties of correlated Dirac semimetal phases in the doped SrIrO.
arXiv comment12 pages, 6 figures
References in corpus (34)
- The electronic properties of graphene
- Ultrahigh electron mobility in suspended graphene
- Weyl and Dirac Semimetals in Three Dimensional Solids
- Electronic transport in two dimensional graphene
- Mott Insulators in the Strong Spin-Orbit Coupling Limit: From Heisenberg to a Quantum Compass and Kitaev Models
- Novel Jeff = 1/2 Mott State Induced by Relativistic Spin-Orbit Coupling in Sr2IrO4
- Temperature dependent transport in suspended graphene
- Observation of the chiral magnetic effect in ZrTe5
- Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
- Twisted Hubbard Model for Sr2IrO4: Magnetism and Possible High Temperature Superconductivity
- Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
- Hydrodynamics of electrons in graphene
- Screening induced temperature dependent transport in 2D graphene
- Optical spectroscopy study of three dimensional Dirac semimetal ZrTe
- Anisotropic transport in the two-dimensional electron gas in the presence of spin-orbit coupling
- Microscopic study of spin-orbit-induced Mott insulator in Ir oxides
- Optical Signatures of Weyl Points in TaAs
- Collapse of the Mott gap and emergence of a nodal liquid in lightly doped SrIrO
- The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4
- Mobility anisotropy in monolayer black phosphorus due to charged impurities
- Disorder-induced temperature-dependent transport in graphene: Puddles, impurities, activation, and diffusion
- Non-monotonic temperature dependent transport in graphene grown by Chemical Vapor Deposition
- Semiclassical framework for the calculation of transport anisotropies
- Theory of magnetism and metal-insulator transition in layered perovskite iridates
- Semiclassical Boltzmann transport theory for multi-Weyl semimetals
- Density dependent electrical conductivity in suspended graphene: Approaching the Dirac point in transport
- Decoupling of the Antiferromagnetic and Insulating States in Tb doped Sr2IrO4
- Electron and hole doping in the relativistic Mott insulator SrIrO: a first-principles study using band unfolding technique
- Correlation effects and hidden spin-orbit entangled electronic order in parent and electron-doped iridates SrIrO
- Non-uniform carrier density in CdAs evidenced by optical spectroscopy
- Charge transport in gapless chiral electron systems with arbitrary band dispersion
- Semiclassical Boltzmann transport theory of few-layer black phosphorus in various phases
- Two-dimensional Peierls instability via zone boundary Dirac line nodes in layered perovskite oxides
- Nonsymmorphic Dirac semimetal and carrier dynamics in doped spin-orbit-coupled Mott insulator SrIrO