Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1998-12-27
Physics
Condensed Matter
Strongly Correlated Electrons
15 pages, 7 ps-figures, to appear in the proceedings of a Conference on Physics of Manganites, held July 26-29 1998 at Michiga
Scientific paper
A systematic study of the electronic structure in perovskite manganites is presented. The effective Hamiltonian is derived by taking into account the degeneracy of $e_g$ orbitals and strong electron correlation in Mn ions. The spin and orbital orderings are examined as functions of carrier concentration in the mean-field approximation applied to the effective Hamiltonian. We obtain the first order phase transition between ferromagnetic metallic and ferromagnetic insulating states in the lightly doped region. The transition is accompanied with the orbital order-disorder one which is directly observed in the anomalous X-ray scattering experiments. The present investigation shows a novel role of the orbital degree of freedom on metal-insulator transition in manganites.
Ishihara Sachiko
Maekawa Sasamichi
Okamoto Satoshi
No associations
LandOfFree
Two Ferromagnetic States in Magnetoresistive Manganites - First Order Transition Driven by Orbitals - does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Two Ferromagnetic States in Magnetoresistive Manganites - First Order Transition Driven by Orbitals -, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two Ferromagnetic States in Magnetoresistive Manganites - First Order Transition Driven by Orbitals - will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-13200