{"title":"Conductance quantization of gold nanowires as a ballistic conductor","authors":"K. Takayanagi, Y. Oshima, Y. Kurui","doi":"10.1109/IITC.2009.5090337","DOIUrl":null,"url":null,"abstract":"Electron transport in gold nanowires is studied by transmission electron microscopy (TEM) simultaneously with conductance measurement by using a scanning tunneling tip as an electrode. Conductance evolution while thinning of a gold nanowire shows sequential steps until it breaks after forming a single atomic chain. The step heights coincide the quantum unit, G0 = 2e2/h = (12.9kΩ)−1, except a little deviation due to multiple reflection. Gold nanowires fabricated in the ≪110≫ orientation can elongate to a several nanometer in length, and show linear current—voltage relation even for the bias voltage of 0.2V. Gold nanowires, thus, behave as a ballistic conductor, and their conductance is quantized to carry current, 1µA per single atomic chain at the bias voltage of 13mV.","PeriodicalId":301012,"journal":{"name":"2009 IEEE International Interconnect Technology Conference","volume":"7 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2009 IEEE International Interconnect Technology Conference","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IITC.2009.5090337","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
Electron transport in gold nanowires is studied by transmission electron microscopy (TEM) simultaneously with conductance measurement by using a scanning tunneling tip as an electrode. Conductance evolution while thinning of a gold nanowire shows sequential steps until it breaks after forming a single atomic chain. The step heights coincide the quantum unit, G0 = 2e2/h = (12.9kΩ)−1, except a little deviation due to multiple reflection. Gold nanowires fabricated in the ≪110≫ orientation can elongate to a several nanometer in length, and show linear current—voltage relation even for the bias voltage of 0.2V. Gold nanowires, thus, behave as a ballistic conductor, and their conductance is quantized to carry current, 1µA per single atomic chain at the bias voltage of 13mV.
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