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arXiv 1302.0155cond-mat.str-el
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揭开Kagome $t-J$模型掺杂相的物理学

Unveiling the physics of the doped phase of the Kagome $t-J$ model

Siegfried Guertler, Hartmut Monien

摘要:

我们研究了Kagome晶格$t-J$模型在低掺杂下的基态性质。我们提出一种新的物质状态。我们的研究结果表明,一个有趣的阶段与自旋交换和动力学交换的平衡,通过构建模块的恒星和它们的内部六边形,被三角形连接。粒子倾向于在六边形中跳跃,而自旋交换主要发生在恒星上。这两种效应共同作用导致了“大卫之星”价键晶体的形成。我们讨论了我们的结果与静态杂质,并显示可能的相关性稀释Kagome晶格海森堡模型,描述实际的化合物。

英文摘要:

We investigate the ground state properties of the Kagome lattice $t-J$ model at low doping. We propose a new state of matter. Our results suggest an interesting phase with a balance of spin-exchange and kinetic exchange through the building blocks of stars and their internal hexagons, being linked by triangles. The particles favor to hop in the hexagons, while the spin-exchange is taking place mainly on the stars. The combined effect leads to the formation of the "Star of David" valence bond crystal. We discuss our result in connection with static impurities, and show the likely relevance to the diluted Kagome lattice Heisenberg model, describing actual compounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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