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首页> 外文期刊>Nanotechnology >Electrical transport studies of individual IrO2 nanorods and their nanorod contacts
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Electrical transport studies of individual IrO2 nanorods and their nanorod contacts

机译：单个IrO2纳米棒及其纳米棒触点的电迁移研究

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摘要

We have studied the electrical transport properties of individual single-crystalline IrO2 nanorods prepared by the metal-organic chemical vapour deposition method. With the help of the standard electron-beam lithographic technique, individual nanorods are contacted by Cr/Au submicron electrodes from above. Utilizing two-probe, three-probe and four-probe measurement configurations, not only the intrinsic electrical transport properties of the individual nanorods but also the electronic contact resistances, Rc(T), have been determined from 300 K down to liquid-helium temperatures. Our measured resistivity behaviour of the nanorods is in close agreement with the current theoretical understanding of this rutile material. On the other hand, we found that the temperature behaviour of the electronic contact resistance obeys the law log R-C alpha T-1/2 over an extremely wide temperature range, from approximately 100 K down to liquid-helium temperatures. This latter conduction process is ascribed to the hopping of electrons through nanoscale Cr granules and/or an amorphous coating incidentally formed at the interface between the submicron Cr/Au electrode and the nanorod.
机译：我们已经研究了通过金属有机化学气相沉积法制备的单个单晶IrO2纳米棒的电传输性质。借助标准电子束光刻技术，单个纳米棒从上方与Cr / Au亚微米电极接触。利用两探针，三探针和四探针测量配置，不仅可以确定单个纳米棒的固有电传输特性，而且还可以确定从300 K到液氦温度的电子接触电阻Rc（T）。 。我们测得的纳米棒的电阻率行为与当前对该金红石材料的理论理解非常一致。另一方面，我们发现，在从大约100 K到液氦温度的极宽温度范围内，电子接触电阻的温度行为均符合法律对数R-C alpha T-1 / 2。后者的传导过程归因于电子通过纳米级Cr颗粒和/或偶然在亚微米Cr / Au电极和纳米棒之间的界面处形成的非晶涂层的跳跃。

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