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

Inagaki, Shunsuke ; Ebara, Narunori ; Kobayashi, Takahiro ; Itaya, Ryota ; Yokota, Kenta ; Yamamoto, Isamu ; Osiecki, Jacek LU ; Ali, Khadiza ; Polley, Craig LU and Zhang, H. M. , et al. (2023) In Physical Review Materials 7(2).
Abstract

The effect of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) adsorption on the physical properties of the two-dimensional (2D) atomic layer superconductor (ALSC) 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 superconducting transition temperature Tc of this ALSC, and the molecular spin tends to decrease it. Owing to its large electron affinity and its nonexistent spin state, the adsorption of PTCDA was expected to increase Tc. However, the PTCDA adsorption dopes only a small number of holes in the In layers and causes a suppression of Tc with a sharp increase in the... (More)

The effect of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) adsorption on the physical properties of the two-dimensional (2D) atomic layer superconductor (ALSC) 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 superconducting transition temperature Tc of this ALSC, and the molecular spin tends to decrease it. Owing to its large electron affinity and its nonexistent spin state, the adsorption of PTCDA was expected to increase Tc. However, the PTCDA adsorption dopes only a small number of holes in the In layers and causes a suppression of Tc with a sharp increase in the normal-state sheet resistance followed by an insulating transition. Taking the disordering of the arrangement of PTCDA into account, we conclude that the increase in resistance is due to the localization effect originating from the random potential that is induced by the disordered PTCDA molecules. The present result also indicates the importance of the crystallinity of a 2D molecular film adsorbed on ALSCs.

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publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Materials
volume
7
issue
2
article number
024805
publisher
American Physical Society
external identifiers
  • scopus:85149657857
ISSN
2475-9953
DOI
10.1103/PhysRevMaterials.7.024805
language
English
LU publication?
yes
id
6bd8b933-617f-4576-b6e1-9f6c1dbf6927
date added to LUP
2023-06-13 11:13:10
date last changed
2023-06-13 11:13:10
@article{6bd8b933-617f-4576-b6e1-9f6c1dbf6927,
  abstract     = {{<p>The effect of 3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA) adsorption on the physical properties of the two-dimensional (2D) atomic layer superconductor (ALSC) 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 superconducting transition temperature Tc of this ALSC, and the molecular spin tends to decrease it. Owing to its large electron affinity and its nonexistent spin state, the adsorption of PTCDA was expected to increase Tc. However, the PTCDA adsorption dopes only a small number of holes in the In layers and causes a suppression of Tc with a sharp increase in the normal-state sheet resistance followed by an insulating transition. Taking the disordering of the arrangement of PTCDA into account, we conclude that the increase in resistance is due to the localization effect originating from the random potential that is induced by the disordered PTCDA molecules. The present result also indicates the importance of the crystallinity of a 2D molecular film adsorbed on ALSCs.</p>}},
  author       = {{Inagaki, Shunsuke and Ebara, Narunori and Kobayashi, Takahiro and Itaya, Ryota and Yokota, Kenta and Yamamoto, Isamu and Osiecki, Jacek and Ali, Khadiza and Polley, Craig and Zhang, H. M. and Johansson, L. S.O. and Uchihashi, Takashi and Sakamoto, Kazuyuki}},
  issn         = {{2475-9953}},
  language     = {{eng}},
  number       = {{2}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Materials}},
  title        = {{Effects of adsorbed molecular ordering to the superconductivity of a two-dimensional atomic layer crystal}},
  url          = {{http://dx.doi.org/10.1103/PhysRevMaterials.7.024805}},
  doi          = {{10.1103/PhysRevMaterials.7.024805}},
  volume       = {{7}},
  year         = {{2023}},
}