Low energy electronic states and triplet pairing in layered cobaltate.
Low energy electronic states and triplet pairing in layered cobaltate.
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DOI：
10.1103/physrevlett.93.176401
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发表时间：
2004-10
影响因子：
8.6
通讯作者：
G. Khaliullin;W. Koshibae;S. Maekawa
中科院分区：
文献类型：
--
作者：
G. Khaliullin;W. Koshibae;S. Maekawa
从莫特绝缘极限出发，考虑了层状钴酸盐中低能电子态的结构。我们认为在低掺杂状态下，波函数的相干部分和费米表面拓扑结构受到相关电子在t（2g）水平上的自旋轨道耦合的强烈影响。基于混合自旋-轨道态的有效t-J模型与铜酸盐的模型截然不同，支持非常规的伪自旋-三重态配对。
The structure of the low-energy electronic states in layered cobaltates is considered starting from the Mott insulating limit. We argue that the coherent part of the wave functions and the Fermi-surface topology at low doping are strongly influenced by spin-orbit coupling of the correlated electrons on the t(2g) level. An effective t-J model based on mixed spin-orbital states is radically different from that for the cuprates, and supports unconventional, pseudospin-triplet pairing.