Investigation of clean ferroelectric surface in Ultra High Vacuum (UHV): Surface conduction and scanning probe microscopy in UHV

Yukio Watanabe, Shigeru Kaku, Daisuke Matsumoto, Yosuke Urakami, S. W. Cheong

Research output: Contribution to journalConference article

11 Citations (Scopus)

Abstract

We discuss the controversies related with an intrinsic screening effect of the ferroelectric surface and report experiments of electron (e-)/hole (h+) layer on the clean surface of insulating pure BaTiO3 single crystals in ultra high vacuum, which is a follow-up of the first report on the intrinsic surface carrier layer on ferroelectric [Y. Watanabe et al., Phys. Rev. Lett. 86, 332 (2001)]. The experiments verify that both accumulation and inversion occur and the surface carrier layer is intrinsic, i.e., mainly due to spontaneous polarization PS not to impurities or defects. We show also that the surface carrier layer is consistent with the 180° domains, the theory for the polarization (D-E) curves of ferroelectric FET [S. L. Miller and P. J. McWhorter, J.Appl. Phys. 72, 5999 (1992)], the invisibility of the carrier layer in the dynamic response of ferroelectric. Especially, the electrostatic and the piezoelectric-response images by UHV-AFM show directly an intrinsic screening effect in 180° domains.

Original languageEnglish
Pages (from-to)157-167
Number of pages11
JournalFerroelectrics
Volume379
Issue number1 PART 2
DOIs
Publication statusPublished - Dec 1 2009
Event9th Russian-CIS-Baltic-Japanese Symposium on Ferroelectricity, RCBJSF-9 - Vilnius, Lithuania
Duration: Jun 15 2008Jun 19 2008

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All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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