Phase Diagram in Manganese Oxides
| dc.creator | Maezono, Ryo | |
| dc.creator | Ishihara, Sumio | |
| dc.creator | Nagaosa, Naoto | |
| dc.date | 1998-05-21 | |
| dc.date | 1998-05-23 | |
| dc.date.accessioned | 2026-07-07T03:10:37Z | |
| dc.date.available | 2026-07-07T03:10:37Z | |
| dc.description | We study theoretically the phase diagram of perovskite manganites taking into account the double degeneracy of the $e_g$ orbitals in a $Mn^{3+}$ ion. A rich phase diagram is obtained in the mean field theory at zero temperature as functions of $x$ (hole concentration) and $J_S$ (antiferromagnetic interaction between $t_{2g}$ spins). The global features of the phase diagram is understood in terms of the superexchange and double exchange interactions, which are strongly depends on types of the occupied $e_g$ orbitals. The strong electron correlation induces the orbital polarization, which controls the dimension of the conduction band. A sequential change of the spin and orbital structures with doping holes is consistent with the recent experiments. In particular, metallic A-type (layered) antiferromagnetic state is found for $x\sim0.5$ with the uniform $d_{x^2-y^2}$ orbital ordering. Effects of the Jahn-Teller distortion are also studied. A short version of this paper has been already published (to appear in PRB-rapid June), but this paper contains additional and more detailed results. | |
| dc.description | REVTEX, 14 figures (figure 1 not available electronically). | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9805267 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9805267 | |
| dc.identifier | Physical Review B, 58, 11 583 (1998). | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28287 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Phase Diagram in Manganese Oxides | |
| dc.type | text |