Deppe M, Caroca-Canales N, Hartmann S, Oeschler N, Geibel C
Max Planck Institute for Chemical Physics of Solids, D-01187 Dresden, Germany.
J Phys Condens Matter. 2009 May 20;21(20):206001. doi: 10.1088/0953-8984/21/20/206001. Epub 2009 Apr 8.
Investigations of the susceptibility, electrical resistivity, specific heat and thermopower of CeTiGe at low temperatures show that this compound is a Kondo lattice system with an enhanced Sommerfeld coefficient γ≈0.3 J K(-2) mol(-1) and where the whole J = 5/2 multiplet is involved in the formation of the ground state. No magnetic order was observed down to 0.4 K. In the temperature range below 10 K we observed Fermi-liquid behavior as indicated by a ρ(T)∼T(2) dependence in the electrical resistivity and a linear specific heat and thermopower. Because of these results we classify CeTiGe as a moderate heavy-fermion system with a non-magnetic ground state.
对CeTiGe在低温下的磁化率、电阻率、比热和热电势的研究表明，该化合物是一个近藤晶格系统，其增强的索末菲系数γ≈0.3 J K⁻² mol⁻¹，且整个J = 5/2多重态参与基态的形成。在低至0.4 K的温度下未观察到磁有序。在低于10 K的温度范围内，我们观察到费米液体行为，这表现为电阻率中ρ(T)∼T²的依赖关系以及线性比热和热电势。基于这些结果，我们将CeTiGe归类为具有非磁性基态的中等重费米子系统。
