Buckling induced Zener polaron instability in half-doped manganites
Strongly Correlated Electrons
2015-05-27 v2
Abstract
By calculating the electronic, orbital, magnetic and lattice structure of half-doped manganites we establish the central role of oxygen buckling caused by the tilting of the MnO octahedra -- in essence a steric effect. The buckling itself does not change the Mn-Mn bonds. Instead it drives the system towards an instability where these bonds can dimerize. In presence of electron-electron interactions, this instability can fully develop and beyond a critical buckling a Zener polaron groundstate with dimerized spins, lattice and orbitals forms spontaneously, resulting in a multiferroic state.
Keywords
Cite
@article{arxiv.1103.4804,
title = {Buckling induced Zener polaron instability in half-doped manganites},
author = {Paolo Barone and Silvia Picozzi and Jeroen van den Brink},
journal= {arXiv preprint arXiv:1103.4804},
year = {2015}
}
Comments
4 pages, 4 figures