{"title":"阶梯式量子线电子传输中衍射的数值证据","authors":"H. Ishio","doi":"10.1109/DD.2003.238177","DOIUrl":null,"url":null,"abstract":"We show a new phenomenon which has been found numerically for coherent electronic transmission through a mesoscopic quantum wire with a step structure. The motion of free electrons in the wire is ballistic with specular reflections from the Dirichlet boundaries. The wire allows only a few modes for electronic transmission. We have found numerically that the electric current shows periodic oscillations with small but nonnegligible amplitudes as a function of a system parameter. We explain that this is purely the effects of diffraction and constructive interference of transmitting electrons at the step structure of the wire.","PeriodicalId":332604,"journal":{"name":"International Seminar Day on Diffraction, 2003. Proceedings.","volume":"41 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2003-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Numerical evidence of diffraction in electronic transmission through a stepped quantum wire\",\"authors\":\"H. Ishio\",\"doi\":\"10.1109/DD.2003.238177\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We show a new phenomenon which has been found numerically for coherent electronic transmission through a mesoscopic quantum wire with a step structure. The motion of free electrons in the wire is ballistic with specular reflections from the Dirichlet boundaries. The wire allows only a few modes for electronic transmission. We have found numerically that the electric current shows periodic oscillations with small but nonnegligible amplitudes as a function of a system parameter. We explain that this is purely the effects of diffraction and constructive interference of transmitting electrons at the step structure of the wire.\",\"PeriodicalId\":332604,\"journal\":{\"name\":\"International Seminar Day on Diffraction, 2003. Proceedings.\",\"volume\":\"41 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2003-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Seminar Day on Diffraction, 2003. Proceedings.\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/DD.2003.238177\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Seminar Day on Diffraction, 2003. Proceedings.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/DD.2003.238177","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Numerical evidence of diffraction in electronic transmission through a stepped quantum wire
We show a new phenomenon which has been found numerically for coherent electronic transmission through a mesoscopic quantum wire with a step structure. The motion of free electrons in the wire is ballistic with specular reflections from the Dirichlet boundaries. The wire allows only a few modes for electronic transmission. We have found numerically that the electric current shows periodic oscillations with small but nonnegligible amplitudes as a function of a system parameter. We explain that this is purely the effects of diffraction and constructive interference of transmitting electrons at the step structure of the wire.
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