Field-induced multiple metal-insulator crossovers of correlated Dirac electrons of perovskite CaIrO${}_3$

Abstract

The interplay between electron correlation and topology of relativistic electrons may lead to a new stage of the research on quantum materials and emergent functions. The emergence of various collective electronic orderings/liquids, which are tunable by external stimuli, is a remarkable feature of correlated electron systems, but has rarely been realized in the topological semimetals with high-mobility relativistic electrons. Here, we report that the correlated Dirac electrons with the Mott criticality in perovskite CaIrO${}_3$ show unconventional field-induced successive metal-insulator-metal crossovers in the quantum limit accompanying a giant magnetoresistance (MR) with MR ratio of 3,500 % (18 T and 1.4 K). The analysis shows that the insulating state originates from the collective electronic ordering such as charge/spin density wave promoted by electron correlation, whereas it turns into the quasi-one-dimensional metal at higher fields due to the field-induced reduction of chemical potential, highlighting the highly field-sensitive character of correlated Dirac electrons.

arXiv comment7 pages, 4 figures

References in corpus (20)

• Two-Dimensional Gas of Massless Dirac Fermions in Graphene
• Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Ultrahigh mobility and giant magnetoresistance in the Dirac semimetal Cd${}_3$As${}_2$
• Nematic order in iron superconductors - who is in the driver's seat?
• Three-dimensional quantum Hall effect and metal-insulator transition in ZrTe5
• Non-Fermi liquid and topological states with strong spin-orbit coupling
• Chiral anomaly, Charge Density Waves, and Axion Strings from Weyl Semimetals
• Evidence for an axionic charge density wave in the Weyl semimetal (TaSe4)2I
• Landau Level Quantization and Almost Flat Modes in Three-dimensional Semi-metals with Nodal Ring Spectra
• Interplay between spin-orbit coupling and Hubbard interaction in SrIrO3 and related Pbnm perovskites
• Excitonic Phases from Weyl Semi-Metals
• Magnetic catalysis and axionic charge-density-wave in Weyl semimetals
• Quantum limit transport and destruction of the Weyl nodes in TaAs
• Topological crystalline semimetals in non-symmorphic lattices
• Weyl fermions with arbitrary monopole in magnetic fields: Landau levels, longitudinal magnetotransport, and density-wave ordering
• Axionic Antiferromagnetic Insulator Phase in a Correlated and Spin-Orbit Coupled System
• Tomonaga-Luttinger liquid and localization in Weyl semimetals
• Ground-state atlas of a three-dimensional semimetal in the quantum limit
• Topological Crystalline Metal in Orthorhombic Perovskite Iridates

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• Topological Semimetal KAlGe with Novel Electronic Instability
• Carrier-density dependence of magnetotransport in correlated Dirac semimetal CaIrO${}_3$
• Signatures of symmetry-stabilized Dirac fermions in correlated oxide CaNbO3 thin films