Topological scenario for stripe formation in manganese oxides
Topological scenario for stripe formation in manganese oxides
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DOI：
10.1103/physrevlett.84.2477
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发表时间：
1999-11
影响因子：
8.6
通讯作者：
Hotta;Takada;Koizumi;Dagotto
中科院分区：
文献类型：
--
作者：
Hotta;Takada;Koizumi;Dagotto
利用拓扑学概念研究锰氧化物的自旋-电荷-轨道复合结构。关键量是与e（g）电子在t（2g）自旋反铁磁环境中沿沿着之字形一维路径通过Jahn-Teller中心平行输运的Berry相连接有关的“缠绕数”w。从这些概念出发，指出实验上观察到的“双条纹”态和“维格纳晶体”态具有不同的w值。重掺杂锰氧化物的电荷有序态的自旋结构的预测进行了讨论。
The spin-charge-orbital complex structures of manganites are studied using topological concepts. The key quantity is the "winding number" w associated with the Berry-phase connection of an e(g) electron parallel transported through Jahn-Teller centers, along zigzag one-dimensional paths in an antiferromagnetic environment of t(2g) spins. From these concepts, it is shown that the "bi-stripe" and "Wigner-crystal" states observed experimentally have different w's. Predictions for the spin structure of the charge-ordered states for heavily doped manganites are discussed.