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首页> 外文期刊>Physica, B. Condensed Matter >Raman and infrared studies of the metal-insulator transition in BaCo1-xNixS2
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Raman and infrared studies of the metal-insulator transition in BaCo1-xNixS2

机译:BaCo1-xNixS2中金属-绝缘体跃迁的拉曼和红外研究

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The electronic states near the insulator-metal transition of stoichiometric BaCo1-xNixS2 were investigated utilizing the different selection rule for Raman scattering from reflection spectroscopy. The electronic Raman component at low energies is large even in the insulating phase at x = 0. The spectral intensity is preserved from 300 to 20 K in the insulating phase (x less than or equal to 0.18), whereas in the metallic phase (x greater than or equal to 0.24), the B-1g and B-2g spectra increase, as temperature decreases. It suggests that the change is induced by the itinerant electronic states through the mass-enhanced type insulator-metal transition. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 4]
机译:利用反射光谱中拉曼散射的不同选择规则,研究了化学计量的BaCo1-xNixS2的绝缘体-金属跃迁附近的电子态。即使在x = 0的绝缘相中,低能量下的电子拉曼分量也很大。在绝缘相(x小于或等于0.18)中,光谱强度在300至20 K范围内保持不变,而在金属相(x)中大于或等于0.24),B-1g和B-2g光谱随温度降低而增加。这表明该变化是由质量增强型绝缘子-金属跃迁的迭代电子态引起的。 (C)2000 Elsevier Science B.V.保留所有权利。 [参考:4]

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