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Surface restructuring in sputter-damaged Bi2Sr2CaCu2O8+δ.
- Source :
-
Physical Review B: Condensed Matter & Materials Physics . Oct2011, Vol. 84 Issue 16, p165411-1-165411-6. 6p. - Publication Year :
- 2011
-
Abstract
- The high-Tc cuprate Bi-2212 is sputtered with 500 eV Ar+ ions, and changes to the surface composition are investigated with low energy (2 keV) Na+ ion scattering. It is shown that ion bombardment leads to the development of a Bi-O overlayer, differing in structure from the underlying material and making the surface highly resistant to further sputtering-induced changes. In contrast, sputtering and ion-scattering simulations would suggest that atoms from lower layers should be present at the surface as a consequence of the kinematics of the sputtering process. It is thus concluded that the Bi-O layer forms because the surfactant effects of Bi reduce the surface energy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10980121
- Volume :
- 84
- Issue :
- 16
- Database :
- Academic Search Index
- Journal :
- Physical Review B: Condensed Matter & Materials Physics
- Publication Type :
- Academic Journal
- Accession number :
- 70590846
- Full Text :
- https://doi.org/10.1103/PhysRevB.84.165411