Hartree-Fock study of the Anderson model coupled to a boson field; Mixed valence states
Hartree-Fock study of the Anderson model coupled to a boson field; Mixed valence states
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Hartree-Fock 对与玻色子场耦合的安德森模型的研究；
DOI：
10.1103/physrevb.15.281
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发表时间：
1977
影响因子：
3.7
通讯作者：
F. Haldane
中科院分区：
文献类型：
--
作者：
F. Haldane
我们推广了金属中磁性杂质的安德森模型，引入了杂质轨道和玻色子场之间的局部耦合。提出了系统的有限温度 Hartree-Fock 和随机相位近似研究；特别关注Hartree-Fock方程的多重解问题，以及该近似中出现的参数空间中的各种相变。识别了缓慢互构价波动的区域，并建议将其应用于混合价稀土材料和非晶材料中的共振双电子态问题。
We generalize the Anderson model of magnetic impurities in metals, introducing a local coupling between the impurity orbital and a boson field. A systematic finite-temperature Hartree-Fock and random-phase-approximation investigation is presented; particular attention is paid to the problem of multiple solutions of the Hartree-Fock equation, and the various phase transitions in parameter space appearing in this approximation. Regions of slow interconfigurational valence fluctuations are identified, and applications to the problems of mixed-valence rare-earth materials and resonant two-electron states in amorphous materials are suggested.