Transition voltage spectroscopy in vacuum break junction: possible role of surface states
The recently proposed transition voltage ( V t ) spectroscopy (TVS) is becoming an increasingly popular tool to analyze electric transport through molecular devices. Very recently, to get additional insight into TVS, the distance ( d ) dependence V t ( d ) in vacuum break junctions has been investig...
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
12 April 2012
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| In: |
epl
Year: 2012, Jahrgang: 98, Heft: 1, Pages: 17010p1-p6 |
| ISSN: | 1286-4854 |
| DOI: | 10.1209/0295-5075/98/17010 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1209/0295-5075/98/17010 Verlag, Volltext: http://stacks.iop.org/0295-5075/98/i=1/a=17010 
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| Verfasserangaben: | Ioan Bâldea |
| Zusammenfassung: | The recently proposed transition voltage ( V t ) spectroscopy (TVS) is becoming an increasingly popular tool to analyze electric transport through molecular devices. Very recently, to get additional insight into TVS, the distance ( d ) dependence V t ( d ) in vacuum break junctions has been investigated experimentally. In this letter, we point out inconsistencies of the initial theoretical interpretation, based on approximate Wenzel-Krammers-Brillouin (WKB)-type results within the standard vacuum tunneling barrier model. We demonstrate that even the exact treatment of this model fails to explain the experimental V t ( d )-dependence, but the agreement with experiment is substantially improved by accounting for electron states (or resonances) at electrodes' surface. These findings suggest that surface states may also play a significant role in molecular devices with sharp electrodes and calls for further investigations. |
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| Beschreibung: | Gesehen am 03.08.2018 received 16 January 2012; accepted in final form 11 March 2012; published online 12 April 2012 |
| Beschreibung: | Online Resource |
| ISSN: | 1286-4854 |
| DOI: | 10.1209/0295-5075/98/17010 |