CaIrO3: A spin-orbit Mott insulator beyond the jeff=1 /2 ground state

M. Moretti Sala, K. Ohgushi, A. Al-Zein, Y. Hirata, G. Monaco, M. Krisch

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)

Abstract

In CaIrO3, electronic correlation, spin-orbit coupling, and tetragonal crystal field splitting are predicted to be of comparable strength. However, the nature of its ground state is still an object of debate, with contradictory experimental and theoretical results. We probe the ground state of CaIrO3 and assess the effective tetragonal crystal field splitting and spin-orbit coupling at play in this system by means of resonant inelastic x-ray scattering. We conclude that insulating CaIrO3 is not a jeff=1/2 iridate and discuss the consequences of our finding to the interpretation of previous experiments. In particular, we clarify how the Mott insulating state in iridates can be readily extended beyond the jeff=1/2 ground state.

Original languageEnglish
Article number176402
JournalPhysical review letters
Volume112
Issue number17
DOIs
Publication statusPublished - 2014 Apr 30
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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