Low energy electrodynamics of the Kondo-lattice antiferromagnet CeCu{2}Ge{2}
Low energy electrodynamics of the Kondo-lattice antiferromagnet CeCu{2}Ge{2}
复制标题
近藤晶格反铁磁体 CeCu{2}Ge{2} 的低能电动力学
DOI：
10.1103/physrevb.85.155105
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发表时间：
2012
影响因子：
3.7
通讯作者：
N. P. Armitage
中科院分区：
文献类型：
--
作者：
G. Boss'e;L. Bilbro;R. V. Aguilar;Lidong Pan;W. Liu;A. Stier;Y. Li;J. Eckstein;N. P. Armitage
We present time-domain THz spectroscopy data of a thin film of the Kondo-lattice antiferromagnet CeCu$_2$Ge$_2$. The low frequency complex conductivity has been obtained down to temperatures below the onset of magnetic order. At low temperatures a narrow Drude-like peak forms, which is similar to ones found in other heavy fermion compounds that do not exhibit magnetic order. Using this data in conjunction with DC resistivity measurements, we obtain the frequency dependence of the scattering rate and effective mass through an extended Drude model analysis. The zero frequency limit of this analysis yields evidence for large mass renormalization even in the magnetic state, the scale of which agrees closely with that obtained from thermodynamic measurements.
