Orbital order induced metal-insulator transition in (La,Ca)MnO3
Materials Science
2009-11-07 v1 Strongly Correlated Electrons
Abstract
We present evidence that the insulator to metal transition in (La,Ca)MnO3 near x~0.2 is driven by the suppression of coherent Jahn-Teller distortions, originating from d type orbital ordering. The orbital ordered state is characterised by large long-range Q2 distortions below To*-o'. Above To*-o' we find evidence for coexistence between an orbital-ordered and -disordered state. This behaviour is discussed in terms of electronic phases of an orbital ordered insulating and orbital-disordered metallic states.
Keywords
Cite
@article{arxiv.cond-mat/0204103,
title = {Orbital order induced metal-insulator transition in (La,Ca)MnO3},
author = {Bas B. Van Aken and Auke Meetsma and Y. Tomioka and Y. Tokura and Thomas T. M. Palstra},
journal= {arXiv preprint arXiv:cond-mat/0204103},
year = {2009}
}
Comments
5 pages, including 5 figures