Nanoscale Probing of Image-Potential States and Electron Transfer Doping in Borophene Polymorphs

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dc.citation.firstpage1169
dc.citation.issueNumber2
dc.citation.journalTitleNano Letters
dc.citation.lastpage1174
dc.citation.volumeNumber21
dc.contributor.authorLiu, Xiaolong
dc.contributor.authorWang, Luqing
dc.contributor.authorYakobson, Boris I.
dc.contributor.authorHersam, Mark C.
dc.date.accessioned2021-02-24T19:15:48Z
dc.date.available2021-02-24T19:15:48Z
dc.date.issued2021
dc.description.abstractBecause synthetic 2D materials are generally stabilized by interfacial coupling to growth substrates, direct probing of interfacial phenomena is critical for understanding their nanoscale structure and properties. Using field-emission resonance spectroscopy with an ultrahigh vacuum scanning tunneling microscope, we reveal Stark-shifted image-potential states of the v1/6 and v1/5 borophene polymorphs on Ag(111) with long lifetimes, suggesting high borophene lattice and interface quality. These image-potential states allow the local work function and interfacial charge transfer of borophene to be probed at the nanoscale and test the widely employed self-doping model of borophene. Supported by apparent barrier height measurements and density functional theory calculations, electron transfer doping occurs for both borophene phases from the Ag(111) substrate. In contradiction with the self-doping model, a higher electron transfer doping level occurs for denser v1/6 borophene compared to v1/5 borophene, thus revealing the importance of substrate effects on borophene electron transfer.
dc.identifier.citationLiu, Xiaolong, Wang, Luqing, Yakobson, Boris I., et al.. "Nanoscale Probing of Image-Potential States and Electron Transfer Doping in Borophene Polymorphs." <i>Nano Letters,</i> 21, no. 2 (2021) American Chemical Society: 1169-1174. https://doi.org/10.1021/acs.nanolett.0c04869.
dc.identifier.digitalacs-nanolett-0c04869
dc.identifier.doihttps://doi.org/10.1021/acs.nanolett.0c04869
dc.identifier.urihttps://hdl.handle.net/1911/110089
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.rightsPermits non-commercial access & re-use, provided that author attribution and integrity aremaintained; but does not permit creation of adaptations or other derivative works(https://creativecommons.org/licenses/by-nc-nd/4.0/).
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleNanoscale Probing of Image-Potential States and Electron Transfer Doping in Borophene Polymorphs
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpublisher version
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