A comment on the superconductivity of Sr2CuO3+delta

TL;DR

This paper challenges the conventional understanding by suggesting that enhanced superconductivity in Sr2CuO3+delta occurs with oxygen vacancies in CuO2 layers, rather than in stoichiometric layers, based on literature review.

Contribution

It proposes a new perspective that oxygen vacancies in CuO2 layers are crucial for superconductivity in Sr2CuO3+delta, contradicting previous assumptions.

Findings

Superconductivity is enhanced with oxygen vacancies in CuO2 layers.

Literature review supports the role of oxygen vacancies in superconductivity.

Contradicts the common belief that stoichiometric CuO2 layers are essential.

Abstract

We have revisited data in the literature and find compelling reasons for believing that enhanced superconductivity occurs in Sr2CuO3+delta when about one third of the oxygen sites in the CuO2 layers are vacant, contrary to the almost universally accepted assumption that superconducting interactions in the high Tc cuprates occur in stoichiometric CuO2 layers.