2013/10/08 by S. Moser, Simon Moser, Luca Moreschini +20 · 3 citations
Chemistry · Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Angle-resolved photoemission spectroscopy #Antiferromagnetism #Atomic physics #Binding energy #Chemistry #Condensed matter physics #Crystallography #Electronic band structure #Electronic structure #Ion #Magnetic and transport properties of perovskites and related materials #Mott insulator #Octahedron #Perovskite (structure) #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Tight binding #cond-mat.str-el
paper · pdf · doi:10.1088/1367-2630/16/1/013008
published as New Journal of Physics, 16 013008 (2014) · 13 pages, 9 figures
arxiv created 2013/10/08 · openalex publication_date 2014/01/09 · arxiv updated 2014/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 favor a Mott over a Slater scenario for this compound.