A nanoemitter based on a superconducting material

Jin Long Hou, Wei Tse Chang, Chih Chiang Shih, Yu Fong Yu, Tsu Yi Fu, Ing Shouh Hwang

研究成果: 雜誌貢獻期刊論文同行評審

1 引文 斯高帕斯(Scopus)

摘要

The coherence of an electron beam is crucial for the performance of electron microscopy, coherent diffractive imaging, holography, and many other advanced instrumentation methods that rely on the phase coherence of electron waves. Here we present a reliable method for preparing a niobium nanoemitter, which is thermally and chemically stable. The tip apex is a (100) facet with a lateral dimension of ∼1 nm, surrounded by four (310) facets. Adsorption of one monolayer of noble gas, particularly Xe, onto the nanoemitter greatly enhances the emission current and current stability. This electron source will probably possess both spatial and temporal coherence if the emitter is cooled below the superconducting temperature.

原文英語
文章編號263107
期刊Applied Physics Letters
108
發行號26
DOIs
出版狀態已發佈 - 2016 六月 27

ASJC Scopus subject areas

  • 物理與天文學(雜項)

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