Transport anomalies in CeCu2Si2

Franz, W.; Steglich, F.; Wohlleben, D.

doi:10.1051/jphyscol:19795118

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Transport anomalies in CeCu₂Si₂

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Franz, W., Steglich, F., & Wohlleben, D. (1979). Transport anomalies in CeCu₂Si₂. Journal de Physique. Colloques, 40(C5), 342-343. doi:10.1051/jphyscol:19795118.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-BFCE-0

Abstract

The transport properties (resistivity ρ, thermopower S, thermal conductivity k) of CeCu2Si2 with unstable 4f shell and of LaCu2Si2 as reference compound were measured between 1.5 K and 300 K. For CeCu2Si2, ρ becomes as large as 220 µΩcm (at 200 K) indicating an electronic mean free path of the order of the Ce-Ce spacing. Correspondingly, below 100 K we infer k ≈ kp (phonon conductivity). The low temperature results of S suggest heavy Fermi liquid behavior with characteristic temperature T* = (30 ± 10) K. Above 20 K, a distinct temperature dependence of both ρ and S originates in the crystal field splitting of the j = 5/2 state of Ce3+ with unstable 4f shell.