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Light-driven electron transport through a molecular junction based on cross-conjugated systems

Author(s): Hsu, Liang-Yan; Xie, Dan; Rabitz, Herschel

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Abstract: This work explores light-driven electron transport through cross-conjugated molecules with different numbers of alkenyl groups. In the framework of coherent quantum transport, the analysis uses single-particle Green’s functions together with non-Hermitian Floquet theory. With realistic parameters stemming from spectroscopy, the simulations show that measurable current (similar to 10(-11) A) caused by photon-assisted tunneling should be observed in a weak driving field (similar to 2 x 10(5) V/cm). Currentfield intensity characteristics give one-photon and two-photon field amplitude power laws. The gap between the molecular orbital and the Fermi level of the electrodes is revealed by current-field frequency characteristics. Due to generalized parity symmetry, the cross-conjugated molecules with odd and even numbers of alkenyl groups exhibit completely different current-polarization characteristics, which may provide an advantageous feature in nanoelectronic applications. (C) 2014 AIP Publishing LLC.
Publication Date: 28-Sep-2014
Electronic Publication Date: 23-Sep-2014
Citation: Hsu, Liang-Yan, Xie, Dan, Rabitz, Herschel. (2014). Light-driven electron transport through a molecular junction based on cross-conjugated systems. JOURNAL OF CHEMICAL PHYSICS, 141 (10.1063/1.4895963
DOI: doi:10.1063/1.4895963
ISSN: 0021-9606
EISSN: 1089-7690
Pages: 124703-1 - 124703-9
Type of Material: Journal Article
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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