Essential Role of the Cooperative Lattice Distortion in the Charge, Orbital and Spin Ordering in doped Manganites

TL;DR

This paper demonstrates that cooperative lattice distortions are crucial in stabilizing charge, orbital, and spin orderings in doped manganites, independent of magnetic interactions, highlighting the lattice's fundamental role.

Contribution

It shows that cooperative lattice distortions alone can produce the observed charge and orbital orderings, emphasizing their essential role in manganite physics.

Findings

Cooperative lattice distortion stabilizes charge and orbital orderings.

Lattice distortions can induce magnetic ordering as a consequence.

Magnetic interactions are not necessary for observed charge and orbital patterns.

Abstract

The role of lattice distortion in the charge, orbital and spin ordering in half doped manganites has been investigated. For fixed magnetic ordering, we show that the cooperative lattice distortion stabilize the experimentally observed ordering even when the strong on-site electronic correlation is taken into account. Furthermore, without invoking the magnetic interactions, the cooperative lattice distortion alone may lead to the correct charge and orbital ordering including the charge stacking effect, and the magnetic ordering can be the consequence of such a charge and orbital ordering. We propose that the cooperative nature of the lattice distortion is essential to understand the complicated charge, orbital and spin ordering observed in doped manganites.