Synthesis, Characterization, and Electronic Structure of a New Molybdenum Bronze SnMo4O6

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• 作者：Dongwoon Jung ; Bang-Hee Lee ; Sung-Jin Kim ; and Won Kang
• 刊名：Chemistry of Materials
• 出版年：2001
• 出版时间：May 2001
• 年：2001
• 卷：13
• 期：5
• 页码：1625 - 1629
• 全文大小：112K
• 年卷期：v.13,no.5(May 2001)
• ISSN：1520-5002

文摘

SnMo₄O₆ was synthesized at low temperature from the mixture of MoO₂ and Mo₂O₃ usingSn flux. The structure of this compound was determined by the single-crystal X-ray diffractionmethod. It crystallizes in the tetragonal space group P4/mbm with a = 9.580(4) and c =2.843(6). The structure of SnMo₄O₆ is composed of edge-sharing Mo₆O₁₂ chains extendingdown the c axis, and four chains are connected to form channels filled with Sn cations. Theresistivity measurement for SnMo₄O₆ along the chain direction shows that the compound ismetallic down to 50 K, and it exhibits semiconducting behavior as the temperature lowersfurther. It was found from extended Huckel tight-binding band calculation that the compoundis likely to be a quasi-one-dimensional metal. The metal-insulator transition in thiscompound is due to the Fermi surface nesting phenomenon, which originates in the one-dimensional characteristic.