Topological Crystalline Metal in Orthorhombic Perovskite Iridates

Abstract

Since topological insulators were theoretically predicted and experimentally observed in semiconductors with strong spin-orbit coupling, more and more attention has been drawn to topological materials which host exotic surface states. These surface excitations are stable against perturbations since they are protected by global or spatial/lattice symmetries. Succeeded in achieving various topological insulators, a tempting challenge now is to search for metallic materials with novel topological properties. Here we predict that orthorhombic perovskite iridates realize a new class of metals dubbed topological crystalline metals, which support zero-energy surface states protected by certain lattice symmetry. These surface states can be probed by photoemission and tunnelling experiments. Furthermore, we show that by applying magnetic fields, the topological crystalline metal can be driven into other topological metallic phases, with different topological properties and surface states.

21 pages, 4 figures

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Cited by in corpus (22)

• Unconventional charge-spin conversion in Weyl-semimetal WTe2
• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• First Principles Calculations for Topological Quantum Materials
• Magnus Hall effect in three-dimensional topological semimetals
• Coupling lattice instabilities across the interface in ultrathin oxide heterostructures
• Symmetry-based approach to nodal structures: Unification of compatibility relations and gapless point classifications
• Superconductivity in the nonsymmorphic line-nodal compound CaSb${}_2$
• Anisotropic linear and nonlinear charge-spin conversion in topological semimetal SrIrO3
• Field-induced multiple metal-insulator crossovers of correlated Dirac electrons of perovskite CaIrO${}_3$
• Nonlinear optical responses in nodal line semimetals
• Isostructural Metal-Insulator Transition Driven by Dimensional-Crossover in SrIrO3 Heterostructures
• Filling-enforced Dirac loops and their evolutions under various perturbations
• Superconductivity in the nodal-line compound La${}_3$Pt${}_3$Bi${}_4$
• Quantized Hall conductance in 3D topological nodal-line semimetals without chiral symmetry
• Giant nonlinear response due to unconventional oscillation in Nodal-line semimetals
• Symmetry-enforced planar nodal chain phonons in non-symmorphic materials
• Triply degenerate nodal lines in topological and non-topological metals
• Exploration of trivial and non-trivial electronic phases and of collinear and non-collinear magnetic phases in low-spin d${}^5$ perovskites
• Morse theory study on the evolution of nodal lines in $\mathcal{P}\mathcal{T}$-symmetric nodal-line semimetals
• Simulation of nodal-line semimetal in amplitude-shaken optical lattices
• In-gap states and strain-tuned band convergence in layered structure trivalent iridate K0.75Na0.25IrO2
• Nodal Line Topological Superfluid and Multiply Protected Majorana Fermi Arc in a Three-Dimensional Time-Reversal-Invariant Superfluid Model