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- W3102296947 abstract "We report a reproducible technique for the fabrication of sharp superconducting Nb tips for scanning tunneling microscopy (STM) and scanning tunneling spectroscopy. Sections of Nb wire with 250 $mu$m diameter are dry etched in an SF$_6$ plasma in a Reactive Ion Etcher. The gas pressure, etching time and applied power are chosen to produce a self-sharpening effect to obtain the desired tip shape. The resulting tips are atomically sharp, with radii of less than 100 nm, and generate good STM images and spectroscopy on single crystal samples of Au(111), Au(100), and Nb(100), as well as a doped topological insulator Bi$_2$Se$_3$ at temperatures ranging from 30 mK to 9 K." @default.
- W3102296947 created "2020-11-23" @default.
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- W3102296947 date "2014-07-07" @default.
- W3102296947 modified "2023-10-18" @default.
- W3102296947 title "Plasma etching of superconducting Niobium tips for scanning tunneling microscopy" @default.
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- W3102296947 doi "https://doi.org/10.1063/1.4887795" @default.
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