Family tree of perovskite-related superconductors

2008/10/20 by H. H. Otto, Otto, Hans Hermann
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism #Superconductivity (cond-mat.supr-con) #Superconductivity in MgB2 and Alloys

paper · pdf · doi:10.48550/arxiv.0810.3501

openalex publication_date 2008/10/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

A simple empirical relation has been found to exist between optimum Tc and the formal mean cation charge of perovskite-related superconductors, covering both conventional superconductors and superconducting cuprates. Tc is shown to increase exponentially with decreasing . It is suggested that a Ba-based cuprate with about 2 reach a Tc around 200 K. The strong correlation may be thought of as an indication for a common mechanism of superconductivity of the whole family of compounds. In addition, the structural assignment for the 'cubic' high-Tc phase reported by Volkov (Tc = 117 K) to the orthorhombic BaCuO2.5 prototype is proposed.

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