Spin fluctuations of the archetypal heavy-fermion compound CeRu_2Si_2 have been investigated by neutron scattering in an entire irreducible Brillouin zone. The dynamical susceptibility is remarkably well described by the self-consistent renormalization (SCR) theory of the spin fluctuation in a phenomenological way, proving the effectiveness of the theory. The present analysis using the SCR phenomenology has allowed us to determine fourteen exchange constants, which show the long-range nature of the Ruderman-Kittel-Kasuya-Yosida interaction.
@article{arxiv.cond-mat/0310270,
title = {Spin Fluctuation in Heavy Fermion CeRu_2Si_2},
author = {Hiroaki Kadowaki and Masugu Sato and Shuzo Kawarazaki},
journal= {arXiv preprint arXiv:cond-mat/0310270},
year = {2007}
}