Electronic Structure of High Tc Cuprates by Electron Spectroscoies

摘要: Employing electron spectroscopic techniques, we show that the ground state of these high TC cuprates is primarily described in terms mixed valency between 3d9 and 3d10-related configurations, with very little Cu3+(3d8) configuration. Temperature dependent changes spectral features are interpreted formation dimerized hole species oxygen p-derived band, while Cu concomitantly assumes a larger proportion 3d10 related It also shown leads to drastic decrease frequency surface resistivity samples.