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https://hdl.handle.net/2440/130857
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Type: | Journal article |
Title: | Temperature-dependent tunneling in Furan Oligomer single-molecule junctions |
Author: | Li, H.B. Xi, Y.-F. Hong, Z.-W. Yu, J. Li, X.-X. Liu, W.-X. Domulevicz, L. Jin, S. Zhou, X.-S. Hihath, J. |
Citation: | ACS sensors, 2021; 6(2):565-572 |
Publisher: | American Chemical Society |
Issue Date: | 2021 |
ISSN: | 2379-3694 2379-3694 |
Statement of Responsibility: | Haipeng B. Li, Yan-Feng Xi, Ze-Wen Hong, Jingxian Yu, Xiao-Xia Li, Wen-Xia Liu ... et al. |
Abstract: | Two commonly observed charge transport mechanisms in single-molecule junctions are coherent tunneling and incoherent hopping. It has been generally believed that tunneling processes yield temperature-independent conductance behavior and hopping processes exhibit increasing conductance with increasing temperature. However, it has recently been proposed that tunneling can also yield temperature-dependent transport due to the thermal broadening of the Fermi energy of the contacts. In this work, we examine a series of rigid, planar furan oligomers that are free from a rotational internal degree of freedom to examine the temperature dependence of tunneling transport directly over a wide temperature range (78-300 K). Our results demonstrate conductance transition from a temperature-independent regime to a temperature-dependent regime. By examining various hopping and tunneling models and the correlation between the temperature dependence of conductance and molecular orbital energy offset from the Fermi level, we conclude thermally assisted tunneling is the dominant cause for the onset of temperature-dependent conductance in these systems. |
Keywords: | charge transport furan-based molecular wire molecular electronics single-molecular conductance single-molecule break junction thermally assisted tunneling |
Rights: | © 2021 American Chemical Society |
DOI: | 10.1021/acssensors.0c02278 |
Grant ID: | http://purl.org/au-research/grants/arc/DP180101581 http://purl.org/au-research/grants/arc/CE140100003 |
Published version: | http://dx.doi.org/10.1021/acssensors.0c02278 |
Appears in Collections: | Aurora harvest 4 Chemistry and Physics publications |
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