Optical investigations of the clathrate α-Eu8Ga16Ge30
Optical investigations of the clathrate α-Eu8Ga16Ge30
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包合物 α-Eu8Ga16Ge30 的光学研究
DOI：
10.1140/epjb/e2005-00265-5
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Kimura
中科院分区：
文献类型：
--
作者：
J. Sichelschmidt;V. Voevodin;V. Pacheco;Y. Grin;F. Steglich;T. Nishi;S. Kimura
我们对笼形化合物α-Eu8Ga16- xGe30 xin在0.007-30 eV能量范围内的光学反射率进行了测量，以研究其电子能带结构。在光子能量低于0.4 eV处，极低的载流子浓度和低于10.5 K的二价Eu离子的铁磁有序特征表征了光谱。在10到100 meV的能量范围内，无序诱导的束缚态影响了光学导电性。
We performed measurements of the optical reflectivity in the energy range 0.007–30 eV on the clathrate-VIII type compound α-Eu8Ga16- xGe30 xin order to investigate its electronic band structure. The very low charge carrier concentration as well as ferromagnetic ordering of the divalent Eu ions below 10.5 K characterize the spectra at photon energies below ≃0.4 eV in accordance with the results of band structure calculations. Disorder induced bound states have been identified to affect the optical conductivity at energies between 10 and 100 meV.
影响因子：
3.7
作者：
Paschen, S;Carrillo-Cabrera, W;Steglich, F
通讯作者：
Steglich, F