Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative

Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative

We demonstrate the validity of using closed-loop z(V) conductance scanning tunneling spectroscopy (STS) measurements for the determination of the effective tunneling barrier by comparing them to more conventional open-loop I(z) measurements. Through the development of a numerical model, the individu...

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Main Authors: Chris Hellenthal, Kai Sotthewes, Martin H. Siekman, E. Stefan Kooij, Harold J. W. Zandvliet
Format: Article
Language:English
Published: Beilstein-Institut 2015-05-01
Series:Beilstein Journal of Nanotechnology
Subjects:
image charge
scanning tunneling spectroscopy (STS)
tunneling barrier
work function
z(V)
Online Access:https://doi.org/10.3762/bjnano.6.113
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spelling doaj-a6a6b529f788488bb7da42445cbb80792020-11-25T02:00:25ZengBeilstein-InstitutBeilstein Journal of Nanotechnology2190-42862015-05-01611116112410.3762/bjnano.6.1132190-4286-6-113Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternativeChris Hellenthal0Kai Sotthewes1Martin H. Siekman2E. Stefan Kooij3Harold J. W. Zandvliet4Physics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, NetherlandsPhysics of Interfaces and Nanomaterials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede, NetherlandsWe demonstrate the validity of using closed-loop z(V) conductance scanning tunneling spectroscopy (STS) measurements for the determination of the effective tunneling barrier by comparing them to more conventional open-loop I(z) measurements. Through the development of a numerical model, the individual contributions to the effective tunneling barrier present in these experiments, such as the work function and the presence of an image charge, are determined quantitatively. This opens up the possibility of determining tunneling barriers of both vacuum and molecular systems in an alternative and more detailed manner.https://doi.org/10.3762/bjnano.6.113image chargescanning tunneling spectroscopy (STS)tunneling barrierwork functionz(V)
collection DOAJ
language English
format Article
sources DOAJ
author Chris Hellenthal
Kai Sotthewes
Martin H. Siekman
E. Stefan Kooij
Harold J. W. Zandvliet
spellingShingle Chris Hellenthal
Kai Sotthewes
Martin H. Siekman
E. Stefan Kooij
Harold J. W. Zandvliet
Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
Beilstein Journal of Nanotechnology
image charge
scanning tunneling spectroscopy (STS)
tunneling barrier
work function
z(V)
author_facet Chris Hellenthal
Kai Sotthewes
Martin H. Siekman
E. Stefan Kooij
Harold J. W. Zandvliet
author_sort Chris Hellenthal
title Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
title_short Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
title_full Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
title_fullStr Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
title_full_unstemmed Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
title_sort closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative
publisher Beilstein-Institut
series Beilstein Journal of Nanotechnology
issn 2190-4286
publishDate 2015-05-01
description We demonstrate the validity of using closed-loop z(V) conductance scanning tunneling spectroscopy (STS) measurements for the determination of the effective tunneling barrier by comparing them to more conventional open-loop I(z) measurements. Through the development of a numerical model, the individual contributions to the effective tunneling barrier present in these experiments, such as the work function and the presence of an image charge, are determined quantitatively. This opens up the possibility of determining tunneling barriers of both vacuum and molecular systems in an alternative and more detailed manner.
topic image charge
scanning tunneling spectroscopy (STS)
tunneling barrier
work function
z(V)
url https://doi.org/10.3762/bjnano.6.113
work_keys_str_mv AT chrishellenthal closedloopconductancescanningtunnelingspectroscopydemonstratingtheequivalencetotheopenloopalternative
AT kaisotthewes closedloopconductancescanningtunnelingspectroscopydemonstratingtheequivalencetotheopenloopalternative
AT martinhsiekman closedloopconductancescanningtunnelingspectroscopydemonstratingtheequivalencetotheopenloopalternative
AT estefankooij closedloopconductancescanningtunnelingspectroscopydemonstratingtheequivalencetotheopenloopalternative
AT haroldjwzandvliet closedloopconductancescanningtunnelingspectroscopydemonstratingtheequivalencetotheopenloopalternative
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