Spin dynamics in a structurally ordered non-Fermi liquid compound: YbRh_2Si_2

Details Spin dynamics in a structurally ordered non-Fermi liquid compound: YbRh_2Si_2 Spin dynamics in a structurally ordered non-Fermi liquid compound: YbRh_2Si_2

2002-07-18

arxiv.org/abs/cond-mat/0207464v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures. To be published in proceedings of musr2002 (Physica B)

Scientific paper

10.1016/S0921-4526(02)01646-0

Muon spin relaxation (muSR) experiments have been carried out at low temperatures in the non-Fermi-liquid heavy-fermion compound YbRh_2Si_2. The longitudinal-field muSR relaxation function is exponential, indicative that the dynamic spin fluctuations are homogeneous. The relaxation rate 1/T_1 varies with applied field as H^{-y}, y = 1.0 \pm 0.1, which implies a scaling law of the form \chi''(\omega) \propto \omega^{-y} f(\omega/T), \lim_{x\to0} f(x) = x for the dynamic spin susceptibility.

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