Magnetic pairing mechanism for superconductivity in the Heisenberg model.
Magnetic pairing mechanism for superconductivity in the Heisenberg model.
复制标题
海森堡模型中超导磁配对机制。
DOI：
10.1103/physrevb.40.119
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Zevin
中科院分区：
文献类型：
--
作者：
Camley;von der Linden W;Zevin
Aharony最近提出了一个简单的磁阻挫模型来描述高金属T//亚金属C//材料中的空穴配对，并在Ising模型框架下计算了结合能。我们在更现实的海森堡模型中探索了同样的配对机制，发现结合能比伊辛模型的结果小。此外，还讨论了用空穴簇代替简单空穴对的可能性。最后，我们证明了邻近的平面可以降低某些参数区域的结合能.
Aharony has suggested recently a simple magnetic frustration model for thepairing of holes in high-/ital T//sub /ital c// materials and evaluated the bindingenergy within an Ising-model framework. We explore the same pairing mechanismwithin the more realistic Heisenberg model and find that the binding energiesare smaller compared to the results from the Ising model. In addition, thepossibility of clusters of holes instead of simple pairs is discussed. Finallywe show that nearby planes can reduce the binding energy for some regions ofparameters.