Monoclinic SrIrO${}_3$ - A Dirac semimetal produced by non-symmorphic symmetry and spin-orbit coupling

Abstract

SrIrO${}_3$ crystallizes in a monoclinic structure of distorted hexagonal perovskite at ambient pressure. The transport measurements show that the monoclinic SrIrO${}_3$ is a low-carrier density semimetal, as in the orthorhombic perovskite polymorph. The electronic structure calculation indicates a semimetallic band structure with Dirac bands at two high-symmetry points of Brillouin zone only when spin-orbit coupling is incorporated, suggesting that the semimetallic state is produced by the strong spin-orbit coupling. We argue that the Dirac bands are protected by the non-symmorphic symmetry of lattice.

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Cited by in corpus (4)

• Spin-orbit-entangled electronic phases in 4$d$ and 5$d$ transition-metal compounds
• Tunable and Enhanced Rashba Spin-Orbit Coupling in Iridate-Manganite Heterostructures
• Correlated Dirac semimetal states in nonsymmorphic MIrO${}_3$ (M=Sr, Ba and Ca)
• Evidence for strong electron correlations in a non-symmorphic Dirac semimetal