Airy-function electron localization in the oxide superlattices

Z. S. Popovic; S. Satpathy

Airy-function electron localization in the oxide superlattices

Materials Science 2007-05-23 v1 Strongly Correlated Electrons

Authors: Z. S. Popovic , S. Satpathy

Abstract

Oxide superlattices and microstructures hold the promise for creating a new class of devices with unprecedented functionalities. Density-functional studies of the recently fabricated superlattices of lattice-matched perovskite titanates (SrTiO3)n/(LaTiO3)m reveal a classic wedge-shaped potential originating from the Coulomb potential of a charged sheet of La atoms. The potential in turn confines the electrons in the vicinity of the sheet, leading to an Airy-function localization of the electron states. Magnetism is suppressed for structures with a single LaTiO3 monolayer, while the bulk antiferromagnetism is recovered in the structures with a thicker LaTiO3, with a narrow transition region separating the magnetic LaTiO3 and the non-magnetic SrTiO3.

Keywords

oxide heterostructures perovskite magnetism electronic structure

Cite

@article{arxiv.cond-mat/0409281,
  title  = {Airy-function electron localization in the oxide superlattices},
  author = {Z. S. Popovic and S. Satpathy},
  journal= {arXiv preprint arXiv:cond-mat/0409281},
  year   = {2007}
}

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