Ultrafast method for scanning tunneling spectroscopy
A scanning tunneling microscope (STM) combines unique capabilities in imaging and spectroscopy with atomic precision, and it can obtain energy-resolved spectroscopic data with atomic resolution. In this paper, we utilize a recently proposed modification to the STM feedback control loop to acquire hi...
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Veröffentlicht in: | Journal of vacuum science and technology. B, Nanotechnology & microelectronics Nanotechnology & microelectronics, 2021-07, Vol.39 (4) |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | A scanning tunneling microscope (STM) combines unique capabilities in imaging and spectroscopy with atomic precision, and it can obtain energy-resolved spectroscopic data with atomic resolution. In this paper, we utilize a recently proposed modification to the STM feedback control loop to acquire high quality
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2 images. We have developed a constant differential conductance imaging method by closing the STM feedback loop with a high precision
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V measurement. In this mode, the tip’s vertical position is adjusted so as to keep the differential conductance constant during raster scanning of the surface. Based on this imaging mode, we propose a new technique to acquire fast and reliable scanning tunneling spectroscopy (STS) data simultaneously with the imaging. |
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ISSN: | 2166-2746 2166-2754 |
DOI: | 10.1116/6.0001087 |