Heavy antiferromagnetic phases in Kondo lattices.

Heavy antiferromagnetic phases in Kondo lattices.
复制标题

DOI:
10.1103/physrevlett.110.026403
复制
发表时间:
2012-10
影响因子:
8.6
通讯作者:
L. Isaev;I. Vekhter
L. Isaev;I. Vekhter
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
L. Isaev;I. Vekhter

文献摘要

被引文献

相似文献

我们提出了一个微观的物理机制,稳定共存的近藤效应和反铁磁性的重费米子系统。我们考虑了一个二维量子Kondo-Heisenberg晶格模型,并证明了长程电子跳跃导致了一个强大的反铁磁Kondo态。通过使用一个修改的从玻色子平均场方法,我们分析了在一个参数范围内的重反铁磁相的稳定性,并讨论了不同阶段之间的过渡。我们的研究结果可以用来指导未来的实验重费米子化合物。
We propose a microscopic physical mechanism that stabilizes the coexistence of the Kondo effect and antiferromagnetism in heavy-fermion systems. We consider a two-dimensional quantum Kondo-Heisenberg lattice model and show that long-range electron hopping leads to a robust antiferromagnetic Kondo state. By using a modified slave-boson mean-field approach we analyze the stability of the heavy antiferromagnetic phase across a range of parameters, and discuss transitions between different phases. Our results may be used to guide future experiments on heavy fermion compounds.