Anisotropic drude response and the effect of anisotropic C substitution in Mg(B1-xCx)2
Anisotropic drude response and the effect of anisotropic C substitution in Mg(B1-xCx)2
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DOI：
10.1103/physrevlett.97.037002
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发表时间：
2006-07-21
影响因子：
8.6
通讯作者：
Tajima, S.
中科院分区：
文献类型：
--
作者：
Kakeshita, T.;Lee, S.;Tajima, S.
通过显微镜光谱技术直接测定了 Mg(B1-xCx)(2) 小单晶的面内和面外光谱。与之前的报告相反，两个方向的估计等离子体频率与频带计算非常一致。对应于多波段系统的多德鲁德图片对于解释整个光谱轮廓是必要的。碳取代引起的光谱变化表明载流子浓度降低以及散射率增加，特别是在西格玛带中。
The in-plane and the out-of-plane optical spectra of small single crystals of Mg(B1-xCx)(2) were directly determined by a microscope spectroscopy technique. Contrary to previous reports, the estimated plasma frequencies for both directions are quite consistent with the band calculation. A multi-Drude picture corresponding to a multiband system is necessary to explain the whole spectral profile. The spectral changes with the carbon substitution indicate a decrease of carrier concentration as well as an increase of scattering rate, particularly, in the sigma bands.