The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

S. Moser; L. Moreschini; A. Ebrahimi; B. Dalla Piazza; M. Isobe; H. Okabe; J. Akimitsu; V. V. Mazurenko; K. S. Kim; A. Bostwick; E. Rotenberg; J. Chang; H. M. Rønnow; M. Grioni

doi:10.1088/1367-2630/16/1/013008

The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

Strongly Correlated Electrons 2014-06-05 v2

Authors: S. Moser , L. Moreschini , A. Ebrahimi , B. Dalla Piazza , M. Isobe , H. Okabe , J. Akimitsu , V. V. Mazurenko , K. S. Kim , A. Bostwick , E. Rotenberg , J. Chang , H. M. Rønnow , M. Grioni

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Abstract

We report angle-resolved photoemission (ARPES) measurements, density functional and model tight-binding calculations on Ba $_2$ IrO $_4$ (Ba-214), an antiferromagnetic ( $T_N=230$ K) insulator. Ba-214 does not exhibit the rotational distortion of the IrO $_6$ octahedra that is present in its sister compound Sr $_2$ IrO $_4$ (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 Sr-214 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 $T_N$ , and favour a Mott over a Slater scenario for this compound.

Keywords

electronic structure Ba$_2$IrO$_4$ ARPES spin-orbit interaction Mott insulator perovskite iridates

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@article{arxiv.1310.1307,
  title  = {The electronic structure of the high-symmetry perovskite iridate Ba2IrO4},
  author = {S. Moser and L. Moreschini and A. Ebrahimi and B. Dalla Piazza and M. Isobe and H. Okabe and J. Akimitsu and V. V. Mazurenko and K. S. Kim and A. Bostwick and E. Rotenberg and J. Chang and H. M. Rønnow and M. Grioni},
  journal= {arXiv preprint arXiv:1310.1307},
  year   = {2014}
}

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13 pages, 9 figures

The electronic structure of the high-symmetry perovskite iridate Ba2IrO4

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