2003/07/31 by H. Kadowaki, Hiroaki Kadowaki, B. Fåk +8
Materials Science · Physics and Astronomy · #Iron-based superconductors research #Magnetic and transport properties of perovskites and related materials #Rare-earth and actinide compounds #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.68.140402
published as Phys. Rev. B 68, 140402 (2003) · 4 pages, 4 figures
arxiv created 2003/09/23 · openalex publication_date 2003/10/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Neutron scattering shows that non-Fermi-liquid behavior of the heavy-fermion compound CeNi2Ge2 is brought about by the development of low-energy spin fluctuations with an energy scale of 0.6 meV. They appear around the antiferromagnetic wave vectors ((1)/(2)(1)/(2)0) and (00(3)/(4)) at low temperatures, and coexist with high-energy spin fluctuations with an energy scale of 4 meV and a modulation vector (0.23,0.23,(1)/(2)). This unusual energy dependent structure of Im\ensuremathχ(Q,E) in Q space suggests that quasiparticle bands are important.