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231223s2011 xx |||||o 00| ||eng c |
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|a 10.1002/jcc.21749
|2 doi
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|a eng
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| 100 |
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|a Liu, Hongmei
|e verfasserin
|4 aut
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|a Can the transition from tunneling to hopping in molecular junctions be predicted by theoretical calculation?
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Completed 21.07.2011
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|a Date Revised 07.04.2011
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a Copyright © 2011 Wiley Periodicals, Inc.
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|a The electron transport mechanism changes from tunneling to hopping as molecular length increases. To validate the theoretical simulation after the transition point and clarify influence of electronic structures on the transition, we calculated the conductance of a series of conjugated molecules by density functional theory together with the nonequilibrium Green's function. We found that the highest occupied molecular orbital energy level, transmission spectrum, and the reorganization energy are good indicators for the transition of the electron transport mechanism. The calculated resistances of short junctions (<50 Å, before the transition point) are consistent with the experimental result, following the tunneling mechanism. However, the theoretical predication failed for long molecules, indicating the limitation of the theoretical framework of elastic scattering when the electron transport mechanism changes to hopping
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|a Journal Article
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|a Zhao, Zhenzhen
|e verfasserin
|4 aut
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|a Wang, Nan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yu, Cui
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Zhao, Jianwei
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of computational chemistry
|d 1984
|g 32(2011), 8 vom: 01. Juni, Seite 1687-93
|w (DE-627)NLM098138448
|x 1096-987X
|7 nnns
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| 773 |
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|g volume:32
|g year:2011
|g number:8
|g day:01
|g month:06
|g pages:1687-93
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|u http://dx.doi.org/10.1002/jcc.21749
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