Unveiling new magnetic phases of undoped and doped manganites

被引：87

作者：

Hotta, T ^{[1
]}

Moraghebi, M

Feiguin, A

Moreo, A

Yunoki, S

Dagotto, E

机构：

[1] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

[2] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32306 USA

[3] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

[4] SISSA, I-34014 Trieste, Italy

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.90.247203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Novel ground-state spin structures in undoped and lightly doped manganites are investigated based on the orbital-degenerate double-exchange model, via mean-field and numerical techniques. In undoped manganites, a new antiferromagnetic (AFM) state, called the E-type phase, is found adjacent in parameter space to the A-type AFM phase. Its structure is in agreement with recent experimental results. This insulating E-AFM state is also competing with a ferromagnetic metallic phase as well. For doped layered manganites, the phase diagram includes another new AFM phase of the CxE1-x type. Experimental signatures of the new phases are discussed.

引用

页数：4

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