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The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Publication date 2014
Author Moser S., Moreschini L., Ebrahimi A., Dalla Piazza B., Isobe M., Okabe H., Akimitsu J., Mazurenko V. V., Kim K. S., Bostwick A., Rotenberg E., Chang J., Ronnow H. M., Grioni M.,
Project Mott Physics Beyond the Heisenberg Model in Iridates and Related Materials
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Original article (peer-reviewed)

Journal NEW JOURNAL OF PHYSICS
Volume (Issue) 16
Page(s) 013008
Title of proceedings NEW JOURNAL OF PHYSICS
DOI 10.1088/1367-2630/16/1/013008

Open Access

URL http://infoscience.epfl.ch/record/196328?ln=en
Type of Open Access Repository (Green Open Access)

Abstract

We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba2IrO4 (Ba-214), an antiferromagnetic (T-N = 230 K) insulator. Ba-214 does not exhibit the rotational distortion of the IrO6 octahedra that is present in its sister compound Sr2IrO4 (Sr-214), and is therefore an attractive reference material to study the electronic structure of layered iridates. We find that the band structures of Ba-214 and Sr214 are qualitatively similar, hinting at the predominant role of the spin-orbit interaction in these materials. Temperature-dependent ARPES data show that the energy gap persists well above TN, and favor a Mott over a Slater scenario for this compound.
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