The J_{eff}=1/2 insulator Sr3Ir2O7 studied by means of angle-resolved photoemission spectroscopy
B. M. Wojek, M. H. Berntsen, S. Boseggia, A. T. Boothroyd and, D. Prabhakaran, D. F. McMorrow, H. M. R{\o}nnow, J. Chang, O., Tjernberg
TL;DR
This study uses angle-resolved photoemission spectroscopy to explore the electronic structure of the J_{eff}=1/2 insulator Sr3Ir2O7, revealing similarities and differences with related compounds and comparing experimental data with theoretical calculations.
Contribution
It provides the first detailed ARPES analysis of Sr3Ir2O7, highlighting spectral weight distribution differences and better agreement with band-structure calculations than Sr2IrO4.
Findings
Similar J_{eff}=1/2} bandwidths in Sr3Ir2O7 and Sr2IrO4
Suppressed photoemission from J_{eff}=1/2 states in Sr3Ir2O7
Better agreement of Sr3Ir2O7 data with band-structure calculations
Abstract
The low-energy electronic structure of the J_{eff}=1/2 spin-orbit insulator Sr3Ir2O7 has been studied by means of angle-resolved photoemission spectroscopy. A comparison of the results for bilayer Sr3Ir2O7 with available literature data for the related single-layer compound Sr2IrO4 reveals qualitative similarities and similar J_{eff}=1/2 bandwidths for the two materials, but also pronounced differences in the distribution of the spectral weight. In particuar, photoemission from the J_{eff}=1/2 states appears to be suppressed. Yet, it is found that the Sr3Ir2O7 data are in overall better agreement with band-structure calculations than the data for Sr2IrO4.
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