High-quality all-oxide Schottky junctions fabricated on heavily doped Nb: SrTi O3 substrates

A. Ruotolo, C. Y. Lam, W. F. Cheng, K. H. Wong, Chi Wah Leung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

51 Citations (Scopus)


We present a detailed investigation of the electrical properties of epitaxial La0.7 Sr0.3 Mn O3/Sr Ti0.98 Nb0.02 O3 Schottky junctions. A fabrication process that allows reduction of the junction dimensions to current electronic device size has been employed. A heavily doped semiconductor has been used as a substrate in order to suppress its series resistance. We show that, unlike standard semiconductors, high-quality oxide-based Schottky junctions maintain a highly rectifying behavior for doping concentration of the semiconductor larger than 1020 cm-3. Moreover, the junctions show hysteretic current-voltage characteristics.
Original languageEnglish
Article number075122
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - 21 Aug 2007

ASJC Scopus subject areas

  • Condensed Matter Physics

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