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首页> 外文期刊>Physica, B. Condensed Matter >Strong anharmonicity of Pr thermal vibration in heavy fermion superconductor PrOs4Sb12
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Strong anharmonicity of Pr thermal vibration in heavy fermion superconductor PrOs4Sb12

机译:重型费米超导体PrOs4Sb12中Pr热振动的强非谐性

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In order to clarify the detailed structure of PrOs4Sb12, single crystal neutron diffraction experiments were carried out and obtained data were analyzed by means of the maximum entropy method (MEM). A space- and time-averaged nuclear density distribution reflecting thermal vibration can be obtained through the MEM analysis. The result unveils a widely spread Pr distribution in the Sb cage at room temperature. The Pr density has a almost flat distribution in the real space centered at the Sb cage, which reaches roughly 0.58 angstrom in the full width at half maximum (FWHM). These features are far from the simple harmonic model, namely, the present result suggests the strong anharmonicity of the Pr potential in the Sb cage. (c) 2007 Elsevier B.V. All rights reserved.
机译:为了阐明PrOs4Sb12的详细结构,进行了单晶中子衍射实验,并通过最大熵法(MEM)对所得数据进行了分析。可以通过MEM分析获得反映热振动的时空平均核密度分布。结果揭示了室温下在Sb笼中广泛分布的Pr分布。 Pr密度在以Sb笼为中心的实际空间中几乎呈平坦分布,其半峰全宽(FWHM)约为0.58埃。这些特征与简单的谐波模型相去甚远,也就是说,目前的结果表明,Sb笼中Pr势具有很强的非谐性。 (c)2007 Elsevier B.V.保留所有权利。

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