Automated extraction of single H atoms with STM: tip state dependency

Møller, Morten and Jarvis, Samuel Paul and Guérinet, Laurent and Sharp, Peter and Woolley, Richard and Rahe, Philipp and Moriarty, Philip (2017) Automated extraction of single H atoms with STM: tip state dependency. Nanotechnology, 28 (7). 075302. ISSN 1361-6528

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Abstract

The atomistic structure of the tip apex plays a crucial role in performing reliable atomic-scale surface and adsorbate manipulation using scanning probe techniques. We have developed an automated extraction routine for controlled removal of single hydrogen atoms from the H:Si(100) surface. The set of atomic extraction protocols detect a variety of desorption events during scanning tunneling microscope (STM)-induced modification of the hydrogen-passivated surface. The influence of the tip state on the probability for hydrogen removal was examined by comparing the desorption efficiency for various classifications of STM topographs (rows, dimers, atoms, etc). We find that dimer-row-resolving tip apices extract hydrogen atoms most readily and reliably (and with least spurious desorption), while tip states which provide atomic resolution counter-intuitively have a lower probability for single H atom removal.

Item Type: Article
Schools/Departments: University of Nottingham, UK > Faculty of Science > School of Physics and Astronomy
Identification Number: https://doi.org/10.1088/1361-6528/28/7/075302
Depositing User: Eprints, Support
Date Deposited: 16 Jan 2017 14:30
Last Modified: 17 Jan 2017 17:11
URI: http://eprints.nottingham.ac.uk/id/eprint/39873

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