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Possible localization behavior of the inherent conducting polymer (CH3)(0.9)ReO3

机译:固有导电聚合物(CH3)(0.9)ReO3的可能的定位行为

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Polymeric methyltrioxorhenium (poly-MTO) represents the first example of an inherent conducting organometallic oxide. It adopts the structural motives and transport properties of some classical perovskites in two dimensions. In this study we present resistivity data down to 30 mK which exhibit a crossover from a metallic (d rho/dT > 0) to an insulating (d rho/d T < 0) behavior at about 30 K. Below 30 K an unusual resistivity behavior, similar to that of some doped cuprate systems, is observed: initially the resistivity increases approximately as rho similar to log(1/T) before it starts to saturate below 2 K. Furthermore, a linear positive magneto resistance is found (up to 7 T). Temperature dependent magnetization and specific beat measurements in various magnetic fields indicate that the unusual resistivity behavior may be driven by spatial localization of the d(1) moments at the Re atoms. (c) 2006 Elsevier B.V. All rights reserved.
机译:聚合甲基三氧ox(poly-MTO)代表了固有导电有机金属氧化物的第一个例子。它在二维方面采用了一些经典钙钛矿的结构动机和传输特性。在本研究中,我们提供了低至30 mK的电阻率数据,该数据在大约30 K时表现出从金属(d rho / dT> 0)到绝缘(d rho / d T <0)的行为。低于30 K时,电阻率异常观察到的行为类似于某些掺杂的铜酸盐体系:电阻率最初以近似于log(1 / T)的rho值增加,直到它在2 K以下开始饱和为止。此外,发现线性正磁电阻(高达7 T)。与温度有关的磁化强度和各种磁场中的特定拍频测量结果表明,异常的电阻率行为可能是由R​​e原子上d(1)矩的空间定位所驱动的。 (c)2006 Elsevier B.V.保留所有权利。

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