Apparent tunneling barrier height and local work function of atomic arrays

Spatially resolved measurements of the apparent tunneling barrier height Φapp in scanning tunneling microscopy have been used to estimate variations of the local work function Φ of surface structures. We experimentally show that Φapp can fail as a measure of Φ. The discrepancies are attributed to a...

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Main Authors:	Neda Noei, Alexander Weismann, Richard Berndt
Format:	Article
Language:	English
Published:	Beilstein-Institut 2018-12-01
Series:	Beilstein Journal of Nanotechnology
Subjects:	scanning tunneling microscopy tunneling barrier height work function
Online Access:	https://doi.org/10.3762/bjnano.9.283

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spelling	doaj-53458ef6479f4ec58c54be2f0f06e3552020-11-24T22:24:06ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862018-12-01913048305210.3762/bjnano.9.2832190-4286-9-283Apparent tunneling barrier height and local work function of atomic arraysNeda Noei0Alexander Weismann1Richard Berndt2Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, GermanyInstitut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, GermanyInstitut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, GermanySpatially resolved measurements of the apparent tunneling barrier height Φapp in scanning tunneling microscopy have been used to estimate variations of the local work function Φ of surface structures. We experimentally show that Φapp can fail as a measure of Φ. The discrepancies are attributed to a kinetic-energy contribution to Φapp. This contribution depends on the lateral extent of the tunneling current filament and, consequently, on the local surface structure.https://doi.org/10.3762/bjnano.9.283scanning tunneling microscopytunneling barrier heightwork function
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Neda Noei Alexander Weismann Richard Berndt
spellingShingle	Neda Noei Alexander Weismann Richard Berndt Apparent tunneling barrier height and local work function of atomic arrays Beilstein Journal of Nanotechnology scanning tunneling microscopy tunneling barrier height work function
author_facet	Neda Noei Alexander Weismann Richard Berndt
author_sort	Neda Noei
title	Apparent tunneling barrier height and local work function of atomic arrays
title_short	Apparent tunneling barrier height and local work function of atomic arrays
title_full	Apparent tunneling barrier height and local work function of atomic arrays
title_fullStr	Apparent tunneling barrier height and local work function of atomic arrays
title_full_unstemmed	Apparent tunneling barrier height and local work function of atomic arrays
title_sort	apparent tunneling barrier height and local work function of atomic arrays
publisher	Beilstein-Institut
series	Beilstein Journal of Nanotechnology
issn	2190-4286
publishDate	2018-12-01
description	Spatially resolved measurements of the apparent tunneling barrier height Φapp in scanning tunneling microscopy have been used to estimate variations of the local work function Φ of surface structures. We experimentally show that Φapp can fail as a measure of Φ. The discrepancies are attributed to a kinetic-energy contribution to Φapp. This contribution depends on the lateral extent of the tunneling current filament and, consequently, on the local surface structure.
topic	scanning tunneling microscopy tunneling barrier height work function
url	https://doi.org/10.3762/bjnano.9.283
work_keys_str_mv	AT nedanoei apparenttunnelingbarrierheightandlocalworkfunctionofatomicarrays AT alexanderweismann apparenttunnelingbarrierheightandlocalworkfunctionofatomicarrays AT richardberndt apparenttunnelingbarrierheightandlocalworkfunctionofatomicarrays
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Apparent tunneling barrier height and local work function of atomic arrays

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