| | |
| | |
Stat |
Members: 3645 Articles: 2'504'928 Articles rated: 2609
26 April 2024 |
|
| | | |
|
Article overview
| |
|
Effects of rare earth ion size on the stability of the coherent Jahn-Teller distortions in undoped perovskite manganites | T. F. Seman
; K. H. Ahn
; T. Lookman
; A. Saxena
; A. R. Bishop
; P. B. Littlewood
; | Date: |
11 Aug 2012 | Abstract: | We present a theoretical study on the relation between the size of the rare
earth ions, often known as chemical pressure, and the stability of the coherent
Jahn-Teller distortions in undoped perovskite manganites. Using a Keating model
expressed in terms of atomic scale symmetry modes, we show that there exists a
coupling between the uniform shear distortion and the staggered buckling
distortion within the Jahn-Teller energy term. It is found that this coupling
provides a mechanism by which the coherent Jahn-Teller distortion is more
stabilized by smaller rare earth ions. We analyze the appearance of the uniform
shear distortion below the Jahn-Teller ordering temperature, estimate the
Jahn-Teller ordering temperature and its variation between NdMnO3 and LaMnO3,
and obtain the relations between distortions. We find good agreement between
theoretical results and experimental data. | Source: | arXiv, 1208.2304 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
| News, job offers and information for researchers and scientists:
| |