ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
X-ray photoemission spectroscopy was used to examine the reactivity of clean YBa2Cu3O6.9 and Bi2Ca1+xSr2−xCu2O8+y surfaces with adatoms of vapor-deposited bismuth. For YBa2Cu3O6.9, depositions ≤8 A(ring) of Bi induce O 1s, Cu 2p3/2, and Bi 4f line-shape changes due to BiO bonding, limited oxygen loss from the substrate, partial conversion of Cu2+ to Cu1+, and growth of Bi metal. For coverages greater than 8 A(ring), there is no reaction and only Bi metal growth is observed. For Bi deposition onto Bi1Ca1+xSr2−xCu2O8+y, there is minimal reaction with only subtle O 1s and Cu 2p3/2 line-shape changes and the nucleation and growth of Bi metal starting at low coverages (≥2 A(ring)). Comparison shows that Bi is less reactive than other metals, except Ag and Au, and that Bi2Ca1+xSr2−xCu2O8+y is more stable toward Bi deposition than YBa2Cu3O6.9.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.100650
