Phase diagram of half-doped manganites
Journal Article
·
· Physical Review B
The phase diagram of half-doped manganites which may consist of experimentally observed ferromagnetic (FM), A-,C-, and charge-exchange (CE)-type antiferromagnetic (AF) states is obtained in terms of a model which is based on double exchange via degenerate e{sub g} orbitals, the on-site Coulomb interaction (U), and the nearest-neighbor Coulomb interaction (V). We find that, because of the strong spatial anisotropy of the electron hoppings, the on-site Coulomb interaction has different effects on these magnetic order states. As a result, large values of U suppress the FM state and favor the A- and C-type AF states. Moreover, we show that it is the interplay between the on-site and nearest-neighbor Coulomb repulsions that stabilizes the CE phase and results in the charge ordering in the state.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40203477
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 22 Vol. 63; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Phase separation in inhomogeneous mixed-valence systems: Application to manganites
Giant magnetoelectric effect in pure manganite-manganite heterostructures
Phase diagram of the half-filled extended Hubbard model in two dimensions
Journal Article
·
Mon May 01 00:00:00 EDT 2000
· Journal of Applied Physics
·
OSTI ID:20216218
Giant magnetoelectric effect in pure manganite-manganite heterostructures
Journal Article
·
Wed Nov 01 00:00:00 EDT 2017
· Physical Review B
·
OSTI ID:1421977
Phase diagram of the half-filled extended Hubbard model in two dimensions
Journal Article
·
Sun Jun 01 00:00:00 EDT 1997
· Physical Review, B: Condensed Matter
·
OSTI ID:530193