Vortex Domain Walls in Ferroelectrics

Zijian Hong, Sujit Das, Christopher Nelson, Ajay Yadav, Yongjun Wu, Javier Junquera, Long Qing Chen, Lane W. Martin, Ramamoorthy Ramesh

Research output: Contribution to journalArticlepeer-review

Abstract

Controlling the domain formation in ferroelectric materials at the nanoscale is a fertile ground to explore emergent phenomena and their technological prospects. For example, charged ferroelectric domain walls in BiFeO3 and ErMnO3 exhibit significantly enhanced conductivity which could serve as the foundation for next-generation circuits (Estévez and Laurson, Phys. Rev. B 2015, 91, 054407). Here, we describe a concept in which polar vortices perform the same role as a ferroelectric domain wall in classical domain structures with the key difference being that the polar vortices can accommodate charged (i.e., head-to-head and tail-to-tail) domains, for example, in ferroelectric PbTiO3/dielectric SrTiO3 superlattices. Such a vortex domain wall structure can be manipulated in a reversible fashion under an external applied field.

Original languageEnglish (US)
Pages (from-to)3533-3539
Number of pages7
JournalNano letters
Volume21
Issue number8
DOIs
StatePublished - Apr 28 2021

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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