Spin Fluctuation in Heavy Fermion CeRu_2Si_2

Details Spin Fluctuation in Heavy Fermion CeRu_2Si_2 Spin Fluctuation in Heavy Fermion CeRu_2Si_2

2003-10-12

arxiv.org/abs/cond-mat/0310270v3

Phys. Rev. Lett. 92, 097204 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 3 figures, submitted to PRL

Scientific paper

10.1103/PhysRevLett.92.097204

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.

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