Atomic-level engineering of cuprates and manganites

Ivan Bozovic, J. N. Eckstein

Research output: Contribution to journalArticlepeer-review


Using ALL-MBE, we have engineered a novel, artificial (metastable) cuprate superconductor, BiSr2Ca7-xDyxCu8O19 + y, in which only the central Ca layer is doped by Dy. This provides, within a single unit cell, the bottom superconducting electrode, an insulating barrier layer (only few Å thick), and the top superconducting electrode, thus constituting an artificial intra-cell Josephson junction. In this way, we have fabricated the first high-TC tunnel (SIS) junctions. They exhibit significant Josephson supercurrents and very sharp quasiparticle tunneling I-V characteristics. Next, single-crystal thin films of manganites grown by ALL-MBE have shown remarkable anisotropy of colossal magnetoresistance (CMR). We have also fabricated lateral superlattices with alternating stripes (nano-wires) of La1-xCaxMnO3 and La1-xSrxMnO3, few tens of nanometers wide. They show substantial in-plane anisotropy in transport properties, and a fivefold increase in low-field sensitivity. Our most recent results include successful growth of La1-xSrxMnO3 on top of Bi2Sr2CaCu2O8, and vice versa.

Original languageEnglish (US)
Pages (from-to)189-197
Number of pages9
JournalApplied Surface Science
StatePublished - Apr 1997
Externally publishedYes


  • Cuprate superconductors
  • Manganites
  • MBE
  • Nanoengineering

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics


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