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arXiv 1012.4237cond-mat.str-el
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PrFe4P12中标量序交错的微观机制

Microscopic Mechanism for Staggered Scalar Order in PrFe4P12

Shintaro Hoshino, Junya Otsuki, Yoshio Kuramoto

摘要:

提出了PrFe_4P_(12)中标量有序的微观模型,其中f2晶体电场(CEF)单重态和三重态与两个导带相互作用.结合动力学平均场论和连续时间量子Monte Carlo方法,我们得到了一个Kondo单态和CEF单态交错排列的电子有序结构,其总传导数为1.如果两个导带具有不同的占据数,则基态变为半金属态。该模型自然地解释了实验观察到的性能在有序相的PrFe 4 P 12,如标量序参量,温度依赖性的电阻率,场致交错矩,和中子散射的非弹性功能。近藤效应对有序化起着至关重要的作用,与RKKY相互作用的普通磁序形成强烈对比。

英文摘要:

A microscopic model is proposed for the scalar order in PrFe4P12 where f2 crystalline electric field (CEF) singlet and triplet states interact with two conduction bands. By combining the dynamical mean-field theory and the continuous-time quantum Monte Carlo, we obtain an electronic order with staggered Kondo and CEF singlets with the total conduction number being unity per site. The ground state becomes semimetallic provided that the two conduction bands have different occupation numbers. This model naturally explains experimentally observed properties in the ordered phase of PrFe4P12 such as the scalar order parameter, temperature dependence of the resistivity, field-induced staggered moment, and inelastic features in neutron scattering. The Kondo effect plays an essential role for ordering, in strong contrast with ordinary magnetic orders by the RKKY interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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