Architecture of nanoscale ferroelectric domains in GaMo4S8

Erik Neuber, Peter Milde, Adam Butykai, Sandor Bordacs, Hiroyuki Nakamura, Takeshi Waki, Yoshikazu Tabata, Korbinian Geirhos, Peter Lunkenheimer, I. Kézsmárki, Petr Ondrejkovic, Jirka Hlinka, Lukas M. Eng

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Local-probe imaging of the ferroelectric domain structure and auxiliary bulk pyroelectric measurements were conducted at low temperatures with the aim to clarify the essential aspects of the orbitally driven phase transition in GaMo4S8, a lacunar spinel crystal that can be viewed as a spin-hole analogue of its GaV4S8 counterpart. We employed multiple scanning probe techniques combined with symmetry and mechanical compatibility analysis to uncover the hierarchical domain structures, developing on the 10-100 nm scale. The identified domain architecture involves a plethora of ferroelectric domain boundaries and junctions, including primary and secondary domain walls in both electrically neutral and charged configurations, and topological line defects transforming neutral secondary walls into two oppositely charged ones.

Original languageEnglish
Article number445402
JournalJournal of Physics Condensed Matter
Volume30
Issue number44
DOIs
Publication statusPublished - Oct 15 2018

Keywords

  • domain walls
  • ferroelectricity
  • Kelvin probe force microscopy
  • lacunar spinel
  • multiferroicity
  • piezoresponse force microscopy
  • topology

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Neuber, E., Milde, P., Butykai, A., Bordacs, S., Nakamura, H., Waki, T., Tabata, Y., Geirhos, K., Lunkenheimer, P., Kézsmárki, I., Ondrejkovic, P., Hlinka, J., & Eng, L. M. (2018). Architecture of nanoscale ferroelectric domains in GaMo4S8 Journal of Physics Condensed Matter, 30(44), [445402]. https://doi.org/10.1088/1361-648X/aae448