Interfacial charge transfer excitation with large optical nonlinearity in manganite heterostructure

Takuya Satoh, Kenjiro Miyano, Yasushi Ogimoto, Hiroharu Tamaru, Sumio Ishihara

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Interfacial electronic states between LaMnO3 and SrMnO3 have been studied by second-harmonic (SH) spectroscopy. The SH contributions from bulk, surface, and interface were separated by measuring four distinct types of manganite thin films. In the SH spectra, we found a broad peak at 2eV unique to the LaMnO3 SrMnO3 interface, which was assigned to interfacial charge transfer excitation based on a Hartree-Fock calculation. No metallic phase showed up at the interface. Experimental and theoretical second-order susceptibilities χ(2) at the interface were estimated to be ∼10-6esu, which is ten times as large as the highest χ(2) value of BaTiO3.

Original languageEnglish
Article number224403
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number22
DOIs
Publication statusPublished - 2005 Dec 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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