Tuning the Electron Gas at an Oxide Heterointerface via Free Surface Charges

Yanwu Xie, Christopher Bell, Yasuyuki Hikita, Harold Y. Hwang*, Chris Bell

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

54 Citations (Scopus)

Abstract

Stable and polarity-switchable free charges are written on the surface of a LaAlO(3)/SrTiO(3) heterostructure using conducting atomic force microscopy. These charges reversibly tune the conductance at the LaAlO(3)/SrTiO(3) interface in a non-volatile way. The modulation in carrier density is large, approximate to 3 x 10(13) cm(-2), comparable to the maximum modulation achieved by the normal field effect.

Original languageEnglish
Pages (from-to)1744-+
Number of pages5
JournalAdvanced Materials
Volume23
Issue number15
DOIs
Publication statusPublished - 19 Apr 2011

Keywords

  • INTERFACES
  • STATE
  • FILMS

Cite this