Theory of the reentrant charge-order transition in the manganites

Journal Article · Fri Jun 01 00:00:00 EDT 2001 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1358326· OSTI ID:40203820

Hellberg, C Stephen

A theoretical model for the reentrant charge-order transition in the manganites is examined. This transition is studied with a purely electronic model for the e{sub g} Mn electrons: the extended Hubbard model. The electron{endash}phonon coupling results in a large nearest-neighbor repulsion between e{sub g} electrons. Using a finite-temperature Lanczos technique, the model is diagonalized on a 16-site periodic cluster to calculate the temperature-dependent phase boundary between the charge-ordered and homogeneous phases. A reentrant transition is found. The results are discussed with respect to the specific topology of the 16-site cluster. {copyright} 2001 American Institute of Physics.

• Sponsoring Organization: (US)
• OSTI ID: 40203820
• Journal Information: Journal of Applied Physics, Vol. 89, Issue 11; Other Information: DOI: 10.1063/1.1358326; Othernumber: JAPIAU000089000011006627000001; 334111MMM; PBD: 1 Jun 2001; ISSN 0021-8979
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRONS
HUBBARD MODEL
PHYSICS
TOPOLOGY