Conductive tail-to-tail domain walls in epitaxial BiFeO3 films

Yaming Jin, Shuyu Xiao, Jan Chi Yang, Junting Zhang, Xiaomei Lu, Ying Hao Chu, Sang-Wook Cheong, Jiangyu Li, Yi Kan, Chen Yue, Yang Li, Changcheng Ju, Fengzhen Huang, Jinsong Zhu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The complex conductive behavior of ferroelectric domain walls is attracting more and more attention for their potential application as an independent nanoelectronic component. For the (001) epitaxial BiFeO3 films, we find that the domain wall conductivity varies among 71° domain walls, with tail-to-tail (T-T) domain walls more conductive than head-to-head (H-H) and head-to-tail (H-T) ones. Furthermore, it is observed that most of the conductive areas are composed of two parallel lines around the T-T domain walls. These experimental results can be well simulated by our theoretical model based on the polarization configuration and a tunneling mechanism. Our work will help to understand the mechanism of domain wall conductance in ferroelectric materials and further promote the usage of domain walls in advanced nano-devices.

Original languageEnglish (US)
Article number082904
JournalApplied Physics Letters
Volume113
Issue number8
DOIs
StatePublished - Aug 20 2018

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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