Phase-Coherent Charge Transport through a Porphyrin Nanoribbon

Chen, Zhixin and Deng, Jie-Ren and Hou, Songjun and Bian, Xinya and Swett, Jacob L. and Wu, Qingqing and Baugh, Jonathan and Bogani, Lapo and Briggs, G. Andrew D. and Mol, Jan A. and Lambert, Colin J. and Anderson, Harry L. and Thomas, James O. (2023) Phase-Coherent Charge Transport through a Porphyrin Nanoribbon. Journal of the American Chemical Society, 145 (28). pp. 15265-15274. ISSN 0002-7863

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Since the early days of quantum mechanics, it has been known that electrons behave simultaneously as particles and waves, and now quantum electronic devices can harness this duality. When devices are shrunk to the molecular scale, it is unclear under what conditions does electron transmission remain phase-coherent, as molecules are usually treated as either scattering or redox centers, without considering the wave–particle duality of the charge carrier. Here, we demonstrate that electron transmission remains phase-coherent in molecular porphyrin nanoribbons connected to graphene electrodes. The devices act as graphene Fabry–Pérot interferometers and allow for direct probing of the transport mechanisms throughout several regimes. Through electrostatic gating, we observe electronic interference fringes in transmission that are strongly correlated to molecular conductance across multiple oxidation states. These results demonstrate a platform for the use of interferometric effects in single-molecule junctions, opening up new avenues for studying quantum coherence in molecular electronic and spintronic devices.

Item Type:
Journal Article
Journal or Publication Title:
Journal of the American Chemical Society
Uncontrolled Keywords:
?? colloid and surface chemistrybiochemistrygeneral chemistrycatalysisbiochemistrycolloid and surface chemistrygeneral chemistrycatalysischemistry(all) ??
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Deposited On:
14 Aug 2023 15:15
Last Modified:
16 Jul 2024 12:04