Article Effects of adsorbed molecular ordering to the superconductivity of a two-dimensional atomic layer crystal

Shunsuke Inagaki ; Narunori Ebara ; Takahiro Kobayashi ; Ryota Itaya ; Kenta Yokota (National Institute for Materials ScienceROR) ; Isamu Yamamoto ; Jacek Osiecki ; Khadiza Ali ; Craig Polley ; H. M. Zhang ; L. S. O. Johansson ; Takashi Uchihashi SAMURAI ORCID (National Institute for Materials ScienceROR) ; Kazuyuki Sakamoto

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Shunsuke Inagaki, Narunori Ebara, Takahiro Kobayashi, Ryota Itaya, Kenta Yokota, Isamu Yamamoto, Jacek Osiecki, Khadiza Ali, Craig Polley, H. M. Zhang, L. S. O. Johansson, Takashi Uchihashi, Kazuyuki Sakamoto. Effects of adsorbed molecular ordering to the superconductivity of a two-dimensional atomic layer crystal. Physical Review Materials. 2023, 7 (2), 024805. https://doi.org/10.1103/physrevmaterials.7.024805
SAMURAI

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(abstract)

The effect of 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) adsorption to the physical properties of a two-dimensional (2D) atomic-layer superconductor (ALS) In/Si(111)-(√7×√3) has been studied by angle-resolved photoelectron spectroscopy, transport measurements and scanning tunneling microscopy. Hole doping from the adsorbed molecules has been reported to increase the Tc of this ALS, and the molecular spin to decrease it. Owing to its large electron affinity and its nonexistent spin state, the adsorption of PTCDA was expected to increase the Tc. However, the PTCDA adsorption dopes only a small amount of holes and causes a suppression in Tc with a sharp increase in the normal-state sheet resistance, followed by an insulating transition. Taking disordering of the arrangement of PTCDA into account, we conclude that the increase in conductivity results from the localization effect resulting from the random potential that is induced by the disordered PTCDA molecules. The present result also indicates the importance of the crystallinity of 2D molecular film adsorbed on ALSs.

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Keyword: transport measurements, scanning tunneling microscopy, organic molecule, surface atomic layer, angle-resolved photoelectron spectroscopy

Date published: 2023-02-21

Publisher: American Physical Society (APS)

Journal:

  • Physical Review Materials (ISSN: 24759953) vol. 7 issue. 2 024805

Funding:

  • Japan Society for the Promotion of Science JP22H01957
  • Japan Society for the Promotion of Science JP22H01961
  • Japan Society for the Promotion of Science JP20H02707
  • Japan Society for the Promotion of Science JP19H02592
  • Japan Society for the Promotion of Science JP20H05621
  • Vetenskapsrådet 2018-07152
  • VINNOVA 2018-04969
  • Svenska Forskningsrådet Formas 2019-02496

Manuscript type: Author's original (Submitted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4735

First published URL: https://doi.org/10.1103/physrevmaterials.7.024805

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Updated at: 2024-09-10 16:30:20 +0900

Published on MDR: 2024-09-10 16:30:21 +0900

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