Band and Percolation Approaches to Low Temperature Properties of Manganites
Abstract
Properties of the parent compound, LaMnO3 are greatly affected by strong Hund's coupling. Assuming the antiferromagnetic ordering (with a low Neel temperture) along one of the cubic axes, this coupling would result in formation of disconnected ferromagnetic layers. Furthermore, in the presence of the cooperative Jahn-Teller effect the compound becomes a band insulator. At small doping (La1-xCaxMnO3, x ≪ 1) the band insulator phase coexists with the presence of localized holes. An insulator-ferromagnetic metal transition occurs at the percolation point xc=0.16.
- Publication:
-
International Journal of Modern Physics B
- Pub Date:
- 1998
- DOI:
- 10.1142/S0217979298002623
- Bibcode:
- 1998IJMPB..12.3349G