Charge dynamics and metal-insulator transition in perovskite SrIr1−xSnxO3

Jun Fujioka, Tatsuya Okawa, Makoto Masuko, Ayako Yamamoto, Yoshinori Tokura

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Abstract

We investigate the variation of charge dynamics upon the metal-insulator transition for perovskite SrIr1xSnxO3 by employing the optical spectroscopy. The Dirac semimetal of SrIrO3 turns into the antiferromagnetic insulator with a gap of 0.1 eV by the Sn-substitution, accompanying the reconstruction of electronic structure on an energy scale of 1 eV. The spectral intensity of optical excitation between Jeff = 1=2-orbitals is significantly reduced with increasing x, while that between the Jeff = 3=2- and 1=2-orbital shows merely moderate x-dependence. We anticipate that the substituted Sn significantly renormalizes the effective bandwidth of Jeff = 1=2-orbital while modestly changing the Jeff = 3=2-orbital.

Original languageEnglish
Article number123706
JournalJournal of the Physical Society of Japan
Volume87
Issue number12
DOIs
Publication statusPublished - 2018 Jan 1

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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