Heavy antiferromagnetic phases in Kondo lattices.
Heavy antiferromagnetic phases in Kondo lattices.
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DOI:
10.1103/physrevlett.110.026403
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发表时间:
2012-10
影响因子:
8.6
通讯作者:
L. Isaev;I. Vekhter
中科院分区:
文献类型:
--
作者:
L. Isaev;I. Vekhter
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.