Interstitial and substitutional oxide superconductors

Abstract

Oxide superconductors are classified as “interstitial” or “substitutional” depending on the site of the dopant oxygen which causes superconductivity. Only substitutional oxide superconductors normally exhibit photo-induced superconductivity. High-temperature superconductivity originates with dopant oxygen, as has been demonstrated in BSCCO, where the cuprate planes are insulating, but the Bi-O layers superconduct.