Infrared study on the metalinsulator transition in filled skutterudites RRu 4 P 12 ( R= Pr, Sm)
Infrared study on the metalinsulator transition in filled skutterudites RRu 4 P 12 ( R= Pr, Sm)
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填充方钴矿RRu 4 P 12 (R= Pr, Sm)金属绝缘体转变的红外研究
DOI：
10.1016/j.jmmm.2003.11.134
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发表时间：
2004
影响因子：
2.7
通讯作者：
I. Shirotani
中科院分区：
文献类型：
--
作者：
M. Matsunami;L. Chen;H. Okamura;T. Nanba;C. Sekine;I. Shirotani
对填充方钴矿PrRu_4P_（12）和SmRu_4P_（12）进行了红外光谱研究，它们分别在TMI= 60和16 K发生了金属-绝缘体（M-I）转变。在TMI以下清楚地观察到两种化合物的电荷间隙的打开。对于PrRu 4P 12，在TMI以下也观察到新的声子峰，这表明晶体对称性降低。另一方面，没有额外的峰出现在绝缘相SmRu 4P 12。这些结果表明SmRu_4P_（12）的M-I跃迁机制与PrRu_4P_（12）不同。
Infrared study has been made on the filled skutterudites PrRu4P12 and SmRu4P12, which undergo a metal–insulator (M–I) transition at TMI= 60 and 16 K, respectively. The opening of a charge gap for the two compounds are clearly observed below TMI. For PrRu4P12, new phonon peaks are also observed below TMI, which suggests that the crystal symmetry is lowered. On the other hand, no additional peaks appear in the insulating phase for SmRu4P12. These results indicate that the mechanism of M–I transition of SmRu4P12 is different from that of PrRu4P12.