Atomic-scale evolution of local electronic structure across multiferroic domain walls

Ya Ping Chiu*, Yu Ting Chen, Bo Chao Huang, Min Chuan Shih, Jan Chi Yang, Qing He, Chen Wei Liang, Jan Seidel, Yi Chun Chen, Ramamoorthy Ramesh, Ying Hao Chu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

86 Citations (Scopus)


Direct evidence of the electronic configurations across domain walls in BiFeO3 is quantitatively characterized by cross-sectional scanning tunneling microscopy. Atomic-scale band evolution and the asymmetrically built-in potential barrier at domain boundaries are demonstrated. The 109° domain walls register a remarkable decrease in the bandgap, suggesting a new route to control the local conducting channels within 2 nm.

Original languageEnglish
Pages (from-to)1530-1534
Number of pages5
JournalAdvanced Materials
Issue number13
Publication statusPublished - 2011 Apr 5
Externally publishedYes


  • BiFeO
  • domain walls
  • electronic structure
  • polarization discontinuity
  • scanning tunneling microscopy (STM)

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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