期刊
SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
卷 8, 期 5, 页码 347-351出版社
NATL INST MATERIALS SCIENCE
DOI: 10.1016/j.stam.2007.05.008
关键词
scanning tunneling microscopy (STM); STM tip preparation; Au(111); NbSe2; superconductor
This work deals with the preparation and characterization of tungsten tips for the use in UHV low-temperature scanning tunneling microscopy and spectroscopy (STM and STS, respectively). These specific environments require in situ facilities for tip conditioning, for further sharpening of the tips, as well as for reliable tip characterization. The implemented conditioning methods include direct resistive annealing, annealing by electron bombardment, and self-sputtering with noble gas ions. Moreover, results from in situ tip characterization by field emission and STM experiments were compared to ex situ scanning electron microscopy. Using the so-prepared tips, high resolution STM images and tunneling spectra were obtained in a temperature range from ambient down to 350mK, partially with applied magnetic field, on a variety of materials. (c) 2007 NIMS and Elsevier Ltd. All rights reserved.
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