Family tree of perovskite-related superconductors
Superconductivity
2008-10-21 v1
Abstract
A simple empirical relation has been found to exist between optimum Tc and the formal mean cation charge <qc> of perovskite-related superconductors, covering both conventional superconductors and superconducting cuprates. Tc is shown to increase exponentially with decreasing <qc>. It is suggested that a Ba-based cuprate with <qc> 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.
Keywords
Cite
@article{arxiv.0810.3501,
title = {Family tree of perovskite-related superconductors},
author = {Hans Hermann Otto},
journal= {arXiv preprint arXiv:0810.3501},
year = {2008}
}
Comments
8 pages, 1 figure