Bias polarity dependent local electrical conduction in resistive switching TiO2 thin films

Yong Cheol Shin, Min Hwan Lee, Kyung Min Kim, Gun Hwan Kim, Seul Ji Song, Jun Yeong Seok, Cheol Seong Hwang

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

The localized electrical conduction behaviour of a resistive switching TiO2 film was examined by conductive atomic force microscopy (CAFM). Localized filamentary electrical conduction was well resolved with a negative tip bias with respect to the Pt bottom electrode whereas almost uniform electrical conduction was observed with a positive bias. The bias dependence of the CAFM result was attributed to local electrochemical reactions mediated by the high electric field near the CAFM tip. A positive tip bias extended the electrically conducting area much more than the actual tip-surface contact area presumably due to facilitated oxygen loss by the high electric field.

Original languageEnglish
Pages (from-to)112-114
Number of pages3
JournalPhysica Status Solidi - Rapid Research Letters
Volume4
Issue number5-6
DOIs
Publication statusPublished - 2010 Jun

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics

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