Deep data analysis of conductive phenomena on complex oxide interfaces: Physics from data mining

Evgheni Strelcov, Alexei Belianinov, Ying Hui Hsieh, Stephen Jesse, Arthur P. Baddorf, Ying-hao Chu, Sergei V. Kalinin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

Spatial variability of electronic transport in BiFeO3-CoFe 2O4 (BFO-CFO) self-assembled heterostructures is explored using spatially resolved first-order reversal curve (FORC) current voltage (IV) mapping. Multivariate statistical analysis of FORC-IV data classifies statistically significant behaviors and maps characteristic responses spatially. In particular, regions of grain, matrix, and grain boundary responses are clearly identified. k-Means and Bayesian demixing analysis suggest the characteristic response be separated into four components, with hysteretic-type behavior localized at the BFO-CFO tubular interfaces. The conditions under which Bayesian components allow direct physical interpretation are explored, and transport mechanisms at the grain boundaries and individual phases are analyzed. This approach conjoins multivariate statistical analysis with physics-based interpretation, actualizing a robust, universal, data-driven approach to problem solving, which can be applied to exploration of local transport and other functional phenomena in other spatially inhomogeneous systems.

Original languageEnglish
Pages (from-to)6449-6457
Number of pages9
JournalACS Nano
Volume8
Issue number6
DOIs
StatePublished - 24 Jun 2014

Keywords

  • big data
  • conduction hysteresis
  • FORC-IV
  • multivariate analysis
  • oxide heterostructures
  • scanning probe microscopy

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