Montfrooij W, Aronson M C, Rainford B D, Mydosh J A, Murani A P, Haen P, Fukuhara T
University of Michigan, Ann Arbor, MI 48109, USA.
Phys Rev Lett. 2003 Aug 22;91(8):087202. doi: 10.1103/PhysRevLett.91.087202. Epub 2003 Aug 19.
We present inelastic neutron scattering experiments, performed near the antiferromagnetic quantum critical point in Ce(Ru0.24Fe0.76)2Ge2. Both local and long-range fluctuations of the local moments are observed, but due to the Kondo effect only the latter are critical. We propose a phenomenological expression which fits the energy E, temperature T, and wave vector q dependences of the dynamic susceptibility, describing the non-Fermi liquid E/T scaling found at every q.
我们展示了在Ce(Ru0.24Fe0.76)2Ge2的反铁磁量子临界点附近进行的非弹性中子散射实验。观测到了局域磁矩的局域涨落和长程涨落，但由于近藤效应，只有后者是临界的。我们提出了一个唯象表达式，它拟合了动态磁化率对能量E、温度T和波矢q的依赖关系，描述了在每个q处发现的非费米液体E/T标度。
