Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films

J. Nichols; J. Terzic; E. G. Bittle; O. B. Korneta; L. E. De Long; J. W. Brill; G. Cao; S. S. A. Seo

doi:10.1063/1.4801877

Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films

Strongly Correlated Electrons 2013-09-09 v2 Materials Science Superconductivity

Authors: J. Nichols , J. Terzic , E. G. Bittle , O. B. Korneta , L. E. De Long , J. W. Brill , G. Cao , S. S. A. Seo

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

We have synthesized epitaxial Sr2IrO4 thin-films on various substrates and studied their electronic structures as a function of lattice-strains. Under tensile (compressive) strains, increased (decreased) Ir-O-Ir bond-angles are expected to result in increased (decreased) electronic bandwidths. However, we have observed that the two optical absorption peaks near 0.5 eV and 1.0 eV are shifted to higher (lower) energies under tensile (compressive) strains, indicating that the electronic-correlation energy is also affected by in-plane lattice-strains. The effective tuning of electronic structures under lattice-modification provides an important insight into the physics driven by the coexisting strong spin-orbit coupling and electronic correlation.

Keywords

strain engineering thin films epitaxial thin films

Cite

@article{arxiv.1302.0918,
  title  = {Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films},
  author = {J. Nichols and J. Terzic and E. G. Bittle and O. B. Korneta and L. E. De Long and J. W. Brill and G. Cao and S. S. A. Seo},
  journal= {arXiv preprint arXiv:1302.0918},
  year   = {2013}
}

Comments

9 pages, 5 figures, 1 table

Tuning electronic structures via epitaxial strain in Sr2IrO4 thin films

Abstract

Keywords

Cite

Comments

Related papers