Crystal field potential of PrOs4Sb12: consequences for superconductivity.
Crystal field potential of PrOs4Sb12: consequences for superconductivity.
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PrOs4Sb12 的晶体场势：对超导性的影响。
DOI：
10.1103/physrevlett.93.157003
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发表时间：
2004
影响因子：
8.6
通讯作者：
J. Lynn
中科院分区：
文献类型：
--
作者：
E. Goremychkin;R. Osborn;E. Bauer;M. Maple;N. A. Frederick;W. Yuhasz;F. M. Woodward;J. Lynn
非弹性中子散射的结果提供了PrOs_4Sb_（12）晶体场能级方案的解，其中T（h）对称的立方晶体场势中的基态是γ（1）单态。传导电子质量的增强与非弹性交换散射是一致的，我们建议，非弹性四极，或非球面库仑，散射是负责提高超导转变温度。PrOs4Sb12似乎是第一个非球面库仑散射足够强以克服磁对断裂并增加T（c）的化合物。
The results of inelastic neutron scattering provide a solution for the crystal field level scheme in PrOs4Sb12, in which the ground state in the cubic crystal field potential of T(h) symmetry is a Gamma(1) singlet. The conduction electron mass enhancement is consistent with inelastic exchange scattering, and we propose that inelastic quadrupolar, or aspherical Coulomb, scattering is responsible for enhancing the superconducting transition temperature. PrOs4Sb12 appears to be the first compound in which aspherical Coulomb scattering is strong enough to overcome magnetic pair breaking and increase T(c).