Dimerization induced by the RKKY interaction.
Dimerization induced by the RKKY interaction.
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由 RKKY 相互作用诱导的二聚化。
DOI：
10.1103/physrevlett.90.247204
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发表时间：
2002
影响因子：
8.6
通讯作者：
I. Affleck
中科院分区：
文献类型：
--
作者：
J. Xavier;R. Pereira;E. Miranda;I. Affleck
我们报告了在四分之一填充时一维近藤晶格模型的基态中存在自旋二聚化。近藤晶格这一新相的出现可以追溯到局域矩之间的 RKKY 相互作用的形式，并提供了由流动电子间接诱导二聚化的第一个例子。我们提出这种二聚体排序作为准一维有机化合物 (Per)2M(mnt)(2) (M=Pt, Pd) 中观察到的自旋 Peierls 相的驱动机制。此外，这表明可能需要比多尼亚赫范式更丰富的相图来适应重费米子材料的物理特性。
We report the presence of spin dimerization in the ground state of the one-dimensional Kondo lattice model at quarter filling. The emergence of this new phase of the Kondo lattice can be traced to the form of the RKKY interaction between the localized moments and provides the first example of dimerization induced indirectly by itinerant electrons. We propose this dimer ordering as the driving mechanism of the spin-Peierls phase observed in the quasi-one-dimensional organic compounds (Per)2M(mnt)(2) (M=Pt, Pd). Moreover, this suggests that a richer phase diagram than the Doniach paradigm may be needed to accommodate the physics of heavy fermion materials.