Interaction of overlayers of Al and Rb with single-crystalline surfaces of Bi2Sr2CaCu2O8

Journal Article (Journal Article)

Photoemission results from Al and Rb interfaces with single crystals of Bi2Sr2CaCu2O8 high-temperature superconductors are reported. The Al and Rb adsorbates are found to react quite differently with the Bi2Sr2CaCu2O8 substrate. While adatoms of Rb significantly affect only the Bi and O atoms in the top atomic layer, the Al adsorbate profoundly disrupts the bonding character of the whole Bi2Sr2CaCu2O8 material. For Al, the Bi and Cu states are strongly reduced, and the Sr and O states show evidence of oxidized components. In addition, Al causes a strong out-diffusion of oxygen from the bulk. The differences in the reactivity of Al and Rb are discussed in terms of the different mobility of the two atoms.

Full Text

Duke Authors

Cited Authors

  • Lindberg, PAP; Wells, BO; Shen, ZX; Dessau, DS; Lindau, I; Spicer, WE; Mitzi, DB; Kapitulnik, A

Published Date

  • December 1, 1990

Published In

Volume / Issue

  • 67 / 5

Start / End Page

  • 2667 - 2670

International Standard Serial Number (ISSN)

  • 0021-8979

Digital Object Identifier (DOI)

  • 10.1063/1.345480

Citation Source

  • Scopus