Recurrent local resistance breakdown of epitaxial BaTiO3 heterostructures

Y. Watanabe, D. Sawamura, M. Okano

研究成果: ジャーナルへの寄稿学術誌査読

31 被引用数 (Scopus)

抄録

Leakage current through epitaxial BaTiO3 films was investigated to clarify the difference between the characteristics of nanometer and millimeter-size metal contacts. SrTiO3:Nb bottom electrode revealed genuine properties of a single metal/BaTiO3 contact and demonstrated that breakdown voltage and leakage current density at both nanometer and millimeter-size contacts were controlled by the Schottky barrier. However, in marked contrast with millimeter-size contacts, nanometer-size contacts conducted little current below breakdown voltage and repeatedly exhibited abrupt breakdowns having a giant current density >10Amm-2. The breakdown field was as high as 0.45MVcm-1 at the forward bias, while no breakdown occurred up to 0.5MVcm-1 at the reverse bias.

本文言語英語
ページ(範囲)2415-2417
ページ数3
ジャーナルApplied Physics Letters
72
19
DOI
出版ステータス出版済み - 1998
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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