SPSMS, UMR-E 9001, CEA-INAC/UJF-Grenoble 1, 38054 Grenoble, France.
Phys Rev Lett. 2012 Dec 7;109(23):237210. doi: 10.1103/PhysRevLett.109.237210. Epub 2012 Dec 6.
Polarized inelastic neutron scattering under a magnetic field is used to get a microscopic insight into the spin resonance of the heavy fermion superconductor CeCoIn(5). 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.
在磁场下进行的极化非弹性中子散射被用来深入研究重费米子超导体 CeCoIn(5)的自旋共振。共振线形状被发现依赖于中子极化：一些光谱权重对于两个极化通道是共同的，而其余部分则在它们之间平均分配。这证明了自旋共振是一个简并模式，具有三个涨落通道：塞曼分裂贡献和一个附加的纵向模式。
