Heavy-fermion behavior of the spinel-based transition-metal oxide LiV2O4

Heavy-fermion behavior of the spinel-based transition-metal oxide LiV2O4
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尖晶石基过渡金属氧化物LiV2O4的重费米子行为

DOI:
10.1103/physrevb.67.033105
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发表时间:
2002
期刊:
影响因子:
3.7
通讯作者:
Erwin Müller
Erwin Müller
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
M. Laad;L. Craco;Erwin Müller

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受在尖晶石 LiV 2 O 4 中在低 T 下观察到的重费米子费米液体 (HFFL) 特征的启发,我们考虑了一种特定于材料的模型,其中包括局域量子化学、几何挫败晶格结构以及单一方法中的强相关性。特别是,我们展示了几何挫败 (GF) 如何产生交叉尺度 T*«J,即位点间 (AF) 交换,低于该尺度的金属系统显示出 HFFL 特征。我们的场景是对 GF 效应在驱动 LiV 2 O 4 中的 HFFL 行为中的重要性的具体认识,并提供了对实验观察到的各种令人困惑的特征的自然理解。
Motivated by the heavy-fermion Fermi-liquid (HFFL) features observed at low T in the spinel LiV 2 O 4 , we consider a material-specific model that includes aspects of the local quantum chemistry, the geometrically frustrated lattice structure, and strong correlations in a single approach. In particular, we show how geometrical frustration (GF) gives rise to a crossover scale, T*«J, the intersite (AF) exchange, below which the metallic system shows HFFL features. Our scenario is a specific realization of the importance of GF effects in driving HFFL behavior in LiV 2 O 4 , and provides a natural understanding of various puzzling features observed experimentally.
DOI: 10.1088/0953-8984/9/35/010
发表时间: 1997-09-01
影响因子: 2.7
作者:
Anisimov, VI;Poteryaev, AI;Kotliar, G
通讯作者: Kotliar, G