Charge-ordered CE-type and A-type states in half-doped manganites

被引：0
|
作者：
Shu, ZH [1 ]
Dong, JM
Xing, DY
机构：
[1] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Dept Phys, Nanjing 210093, Peoples R China
[3] Jiangsu TV Univ, Nanjing 210013, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2002年 / 16卷 / 32期
关键词：
D O I：
10.1142/S0217979202015005
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
According to the characteristics of the magnetic structures of the CE phase and the A phase for half-doped manganites, a two-dimensional model based on double exchange via degenerate e(g) orbitals as well as the Coulomb interaction and the superexchange interaction has been proposed to discuss the two phases on an equal footing. It is explained why the CE phase is usually easier to be realized for many half-doped manganites, while the A phase occasionally occurs. Moreover, our numerical calculations show that the two phases at x = 0.5 are not spin-canted, which is in good agreement with experimental observations.
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页码：4831 / 4837
页数：7
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