Charge redistribution at y Ba2 Cu3 O7 -metal interfaces

Udo Schwingenschloegl*, C. Schuster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Charge redistribution at interfaces is crucial for electronic applications of high- Tc superconductors, since the band structure is modified on a local scale. The authors address the normal-state electronic structure of Y Ba2 Cu3 O7 (YBCO) at an YBCO-metal contact by first principles calculations for prototypical interface configurations. They derive quantitative results for the intrinsic doping of the superconducting Cu O2 planes due to the metal contact. Their findings can be explained in terms of a band-bending mechanism, complemented by local screening effects. The authors determine a net charge transfer of 0.09-0.13 electrons in favor of the intraplane Cu sites, depending on the interface orientation.

Original languageEnglish (US)
Article number192502
JournalApplied Physics Letters
Volume90
Issue number19
DOIs
StatePublished - May 17 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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