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Title: Effect of fluorine substitution on the electronic states and conductance of CuPc on Cu(100)
Authors: Okuyama, H.
Kuwayama, S.
Hatta, S.
Aruga, T.
Hamamoto, Y.
Shimada, T.
Hamada, I.
Morikawa, Y.
Author's alias: 奥山, 弘
桑山, 紗央里
八田, 振一郎
有賀, 哲也
Keywords: Scanning tunneling microscope
Cu phthalocyanine
Electronic states
Fluorine substitution
Fano effect
Issue Date: 15-Jan-2024
Publisher: Elsevier BV
Journal title: Applied Surface Science
Volume: 643
Thesis number: 158700
Abstract: The electronic states and conductance of CuPc, F₈CuPc, and F₁₆CuPc on Cu(100) were studied by using scanning tunneling microscopy (STM) and the density functional theory (DFT) calculations. For all molecules, the lowest unoccupied molecular orbital (LUMO) was observed around the Fermi level (E_F), regardless of the difference in the original LUMO levels of the free molecules. This indicates that the strong interaction causes the pinning of E_F at LUMO levels. Meanwhile, the differential conductance at E_F is drastically affected by the substitution: it increases and decreases for CuPc and F₁₆CuPc, respectively, suggesting that the Fano effect plays a major role in the conductance. This finding provides a new strategy for the control of molecular conductance by chemical substitution.
Rights: © 2023. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
The full-text file will be made open to the public on 15 January 2026 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
DOI(Published Version): 10.1016/j.apsusc.2023.158700
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