Electron transfer and ionic displacements at the origin of the 2D electron gas at the LAO/STO interface: direct measurements with atomic-column spatial resolution

Adv Mater. 2012 Aug 2;24(29):3952-7. doi: 10.1002/adma.201200667. Epub 2012 Jun 19.

Abstract

Using state-of-the-art, aberration-corrected scanning transmission electron microscopy and electron energy loss spectroscopy with atomic-scale spatial resolution, experimental evidence for an intrinsic electronic reconstruction at the LAO/STO interface is shown. Simultaneous measurements of interfacial electron density and system polarization are crucial for establishing the highly debated origin of the 2D electron gas.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Aluminum Compounds / chemistry*
  • Electron Transport
  • Electrons
  • Gases / chemistry*
  • Ions / chemistry
  • Lanthanum / chemistry*
  • Microscopy, Electron, Scanning Transmission
  • Oxides / chemistry*
  • Spectroscopy, Electron Energy-Loss
  • Strontium / chemistry*
  • Titanium / chemistry*

Substances

  • Aluminum Compounds
  • Gases
  • Ions
  • Oxides
  • Lanthanum
  • Titanium
  • strontium titanium oxide
  • Strontium