Correlated vs. conventional insulating behavior in the Jeff = ½ vs. ¾ bands in the layered iridate Ba2IrO4

M. Uchida, Y. F. Nie, P. D. C. King, C. H. Kim, C. J. Fennie, D. G. Schlom, K. M. Shen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We employ molecular beam epitaxy to stabilize Ba2IrO4 thin films and utilize in situ angle-resolved photoemission spectroscopy to investigate the evolution of its electronic structure through the Neel temperature T-N. Our measurements indicate that dispersions of the relativistic  Jeff = ½ vs. ¾ bands exhibit an unusual dichotomy in their behavior through the Neel transition. Although the charge gap survives into the paramagnetic state, only the Jeff = ½ state exhibits a strong temperature dependence and its gap softens with increasing temperature approaching T-N, while the nearly fully occupied Jeff = ¾ state which remains nearby in energy exhibits negligible changes with temperature.

Original languageEnglish
Article number075142
Number of pages6
JournalPhysical Review. B, Condensed matter and materials physics
Volume90
Issue number7
DOIs
Publication statusPublished - 25 Aug 2014

Keywords

  • SR2IRO4

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