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首页> 外文期刊>Physica, B. Condensed Matter >Mid-infrared absorption in strongly correlated Yb compounds
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Mid-infrared absorption in strongly correlated Yb compounds

机译：高度相关的Yb化合物的中红外吸收

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摘要

The optical conductivity spectra sigma(omega) of intermediate-valence Yb compounds YbAl2, YbCuAl, YbCu2Si2, YbNi2Ge2 and YbInCu4 have been measured. For YbInCu4, sigma(omega) in the infrared region measured on cleaved samples has been found much lower than those previously reported for polished samples. A clear mid-infrared peak in sigma(omega) has been observed for all these compounds. The energy position of the peak systematically varies from 0.1 eV for YbNi2Ge2 to 0.35eV for YbAl2. These results are discussed in terms of the strength of hybridization between the conduction and f electrons in these compounds. (c) 2006 Elsevier B.V. All rights reserved.
机译：测量了中价Yb化合物YbAl2，YbCuAl，YbCu2Si2，YbNi2Ge2和YbInCu4的光导谱σ。对于YbInCu4，发现在劈开样品上测得的红外区域中的sigma（Ω）比以前报道的抛光样品低得多。对于所有这些化合物，在σ中都有一个清晰的中红外峰。峰的能量位置系统地从YbNi2Ge2的0.1 eV到YbAl2的0.35eV。根据这些化合物中的传导电子和f电子之间的杂交强度来讨论这些结果。 （c）2006 Elsevier B.V.保留所有权利。

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