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arXiv 0802.2539cond-mat.str-el
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PrOs PDMATHAAB As $_{12}$晶场能级的非弹性中子散射研究

Inelastic neutron scattering studies of Crystal Field Levels in PrOs$_4$As$_{12}$

Songxue Chi, Pengcheng Dai, T. Barnes, H. J. Kang, J. W. Lynn, R. Bewley, F. Ye, M. B. Maple, Z. Henkie, A. Pietraszko

摘要:

利用中子散射研究了方钴矿中Pr $_4$晶体电场(CEF)的激发.通过与理论谱和中子激发强度的比较,我们确定了Pr的$^{3+}$ CEF能级,并表明基态为磁性$Γ_4^{(2)}$三重态,激发态$Γ_1$、$Γ_4^{(1)}$和$Γ_{23}$分别为0.4、13和23 meV.在PrOs $_4$ As $_{12}$和重费米子超导体PrOs $_4$ Sb $_{12}$中观察到的CEF能级的比较揭示了这两种填充方钴矿基态差异的微观起源。

英文摘要:

We use neutron scattering to study the Pr$^{3+}$ crystalline electric field (CEF) excitations in the filled skutterudite PrOs$_4$As$_{12}$. By comparing the observed levels and their strengths under neutron excitation with the theoretical spectrum and neutron excitation intensities, we identify the Pr$^{3+}$ CEF levels, and show that the ground state is a magnetic $Γ_4^{(2)}$ triplet, and the excited states $Γ_1$, $Γ_4^{(1)}$ and $Γ_{23}$ are at 0.4, 13 and 23 meV, respectively. A comparison of the observed CEF levels in PrOs$_4$As$_{12}$ with the heavy fermion superconductor PrOs$_4$Sb$_{12}$ reveals the microscopic origin of the differences in the ground states of these two filled skutterudites.

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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