New Ideas for Understanding the Structure and Magnetism in AgF₂ : Prediction of Ferroelasticity.

ABSTRACT: In the search for new high-temperature superconductors, it has been proposed that there are strong similarities between the fluoroargentate AgF₂ and the cuprate La₂ CuO₄ . We explored the origin of the possible layered structure of AgF₂ by studying its parent high-symmetry phase and comparing these results with those of a seemingly analogous cuprate, CuF₂ . Our findings first stress the large differences between CuF₂ and AgF₂ . Indeed, the parent structure of AgF₂ is found to be cubic, naturally devoid of any layering, even though Ag²⁺ ions occupy trigonal sites that, nevertheless, allow the existence of a Jahn-Teller effect. The observed Pbca orthorhombic phase is found when the system is co

SUBMITTER: Sanchez-Movellan I 

PROVIDER: S-EPMC8518918 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature