Epitaxial growth and transport properties of compressively-strained Ba2IrO4films

Yun Qi Zhao, Heng Zhang, Xiang Bin Cai, Wei Guo, Dian Xiang Ji, Ting Ting Zhang, Zheng Bin Gu, Jian Zhou, Ye Zhu, Yue Feng Nie

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Ba2IrO4 is a sister compound of the widely investigated Sr2IrO4 and has no IrO6 octahedral rotation nor net canted antiferromagnetic moment, thus it acts as a system more similar to the high-T c cuprate. In this work, we synthesize the Ba2IrO4 epitaxial films by reactive molecular beam epitaxy and study their crystalline structure and transport properties under biaxial compressive strain. High resolution scanning transmission electron microscopy and x-ray diffraction confirm the high quality of films with partial strain relaxation. Under compressive epitaxial strain, the Ba2IrO4 exhibits the strain-driven enhancement of the conductivity, consistent with the band gap narrowing and the stronger hybridization of Ir-t2g and O-2p orbitals predicted in the first-principles calculations.

Original languageEnglish
Article number087401
JournalChinese Physics B
Volume30
Issue number8
DOIs
Publication statusPublished - Jul 2021

Keywords

  • epitaxial strain
  • iridate oxides
  • molecular beam epitaxy
  • transport properties

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this