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Ultrafast method for scanning tunneling spectroscopy

Alemansour, Hamed·Moheimani, S. O. Reza·Owen, James H. G.·Randall, John N.·Fuchs, Ehud
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Abstract

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 d 2 I/dV 2 images. We have developed a constant differential conductance imaging method by closing the STM feedback loop with a high precision dI/dV 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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BibTeXRIS

Alemansour, Hamed, Moheimani, S. O. Reza, Owen, James H. G., Randall, John N., Fuchs, Ehud. 2021-06-23. Ultrafast method for scanning tunneling spectroscopy. https://doi.org/10.1116/6.0001087

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