Titel
Substrate-tuning of correlated spin-orbit oxides revealed by optical conductivity calculations
Autor*in
Beom Hyun Kim
Department of Physics, PCTP, Pohang University of Science and Technology
Kyoo Kim
Department of Physics, PCTP, Pohang University of Science and Technology
... show all
Abstract
We have systematically investigated substrate-strain effects on the electronic structures of two representative Sr-iridates, a correlated-insulator Sr2IrO4 and a metal SrIrO3. Optical conductivities obtained by the ab initio electronic structure calculations reveal that the tensile strain shifts the optical peak positions to higher energy side with altered intensities, suggesting the enhancement of the electronic correlation and spin-orbit coupling (SOC) strength in Sr-iridates. The response of the electronic structure upon tensile strain is found to be highly correlated with the direction of magnetic moment, the octahedral connectivity, and the SOC strength, which cooperatively determine the robustness of Jeff = 1/2 ground states. Optical responses are analyzed also with microscopic model calculation and compared with corresponding experiments. In the case of SrIrO3, the evolution of the electronic structure near the Fermi level shows high tunability of hole bands, as suggested by previous experiments.
Stichwort
Electronic properties and materialsSurfaces, interfaces and thin films
Objekt-Typ
Sprache
Englisch [eng]
Persistent identifier
Erschienen in
Titel
Scientific Reports
Band
6
Publication
Springer Nature
Erscheinungsdatum
2016
Zugänglichkeit
Rechte
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