Evidence for Three Fluctuation Channels in the Spin Resonance of the Unconventional Superconductor CeCoIn5
Evidence for Three Fluctuation Channels in the Spin Resonance of the Unconventional Superconductor CeCoIn5
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DOI：
10.1103/physrevlett.109.237210
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发表时间：
2012-12-06
影响因子：
8.6
通讯作者：
Lapertot, G.
中科院分区：
文献类型：
--
作者：
Raymond, S.;Kaneko, K.;Lapertot, G.
利用磁场下的极化非弹性中子散射，对重费米子超导体CeCoIn 5的自旋共振进行了微观研究。发现共振线形状取决于中子极化：一些谱权是两个极化通道共有的，而其余部分在它们之间均匀分布。这证明自旋共振是一个简并模式，具有三个波动通道：塞曼分裂贡献和一个额外的纵向模式。
Polarized inelastic neutron scattering under a magnetic field is used to get a microscopic insight into the spin resonance of the heavy fermion superconductor CeCoIn5. The resonance line shape is found to depend on the neutron polarization: Some of the spectral weight is common to the two polarization channels while the remaining part is distributed equally between them. This is evidence for the spin resonance being a degenerate mode with three fluctuation channels: A Zeeman split contribution and an additional longitudinal mode.