Core and valence XPS spectra of clean, cleaved single crystals of YBa2Cu3O7D.E. FowlerC.R. Brundleet al.1990Journal of Electron Spectroscopy and Related Phenomena
Core and valence level XPS of clean, cleaved single crystal surfaces of YBa2Cu3O7D.E. FowlerC.R. Brundleet al.1989Physica C: Superconductivity and its applications