تقرير
Automated fabrication technique of gold tips for use in point-contact spectroscopy
| العنوان: | Automated fabrication technique of gold tips for use in point-contact spectroscopy |
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| المؤلفون: | Narasiwodeyar, S., Dwyer, M., Liu, M., Park, W. K., Greene, L. H. |
| المصدر: | Rev. Sci. Instrum. 86, 033903 (2015) |
| سنة النشر: | 2014 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors, Condensed Matter - Strongly Correlated Electrons |
| الوصف: | For a successful point-contact spectroscopy (PCS) measurement, metallic tips of proper shape and smoothness are essential to ensure the ballistic nature of a point-contact junction. Until recently, the fabrication of Au tips suitable for use in point-contact spectroscopy has remained more of an art involving a trial and error method rather than an automated scientific process. To address these issues, we have developed a technique with which one can prepare high quality Au tips reproducibly and systematically. It involves an electronic control of the driving voltages used for an electrochemical etching of a gold wire in an HCl-glycerol mixture or an HCl solution. We find that a stopping current, below which the circuit is set to shut off, is a single very important parameter to produce an Au tip of desired shape. We present detailed descriptions for a two-step etching process for Au tips and also test results from PCS measurements using them. Comment: 16 pages, 5 figures, submitted to Rev. Sci. Instrum |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4913661 |
| URL الوصول: | http://arxiv.org/abs/1412.8201 |
| رقم الأكسشن: | edsarx.1412.8201 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4913661 |
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