Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Electronic structure of Bi nanolines on InAs(100)

Nafday, Dhani ; Richter, Christine ; Heckmann, Olivier ; Wang, Weimin LU orcid ; Mariot, Jean Michel ; Djukic, Uros ; Vobornik, Ivana ; Lefevre, Patrick ; Taleb-Ibrahimi, Amina and Bertran, Franco̧is , et al. (2023) In Applied Surface Science 611.
Abstract

Self-assembled nanolines are attractive to build the technological devices of next generation, but characterizing their electronic properties is often difficult to achieve. In this work we employ angle-resolved photoemission spectroscopy and density functional theory to clarify the electronic structure exhibited by self-assembled Bi nanolines grown on the InAs(100) surface. A surface resonance associated to the reconstructed ζ(4 × 2) surface is visible in the photoemission spectra before and after the formation of the Bi nanolines. This demonstrates that Bi deposition does not necessarily drive a transition to an unreconstructed surface in the substrate, which is contrary to what was reported in previous studies. In addition, experiment... (More)

Self-assembled nanolines are attractive to build the technological devices of next generation, but characterizing their electronic properties is often difficult to achieve. In this work we employ angle-resolved photoemission spectroscopy and density functional theory to clarify the electronic structure exhibited by self-assembled Bi nanolines grown on the InAs(100) surface. A surface resonance associated to the reconstructed ζ(4 × 2) surface is visible in the photoemission spectra before and after the formation of the Bi nanolines. This demonstrates that Bi deposition does not necessarily drive a transition to an unreconstructed surface in the substrate, which is contrary to what was reported in previous studies. In addition, experiment and theory show the presence of a flat band located in the band gap of InAs, just above the valence band maximum. This flat band is associated to the Bi nanolines and possesses a strong orbital character, consistent with its unidimensional nature. These spectral features suggest that Bi nanolines on InAs(100) may have a strongly polarized conductivity, which makes them suitable to be exploited as nanowires in nanotechnology. The coexistence with an accumulation layer suggests an even farther functionalization.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; ; ; ; ; ; and , et al. (More)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; and (Less)
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bi nanolines, Density-functional theory, InAs surface, Photoemission spectroscopy, Self-assembly
in
Applied Surface Science
volume
611
article number
155436
publisher
Elsevier
external identifiers
  • scopus:85141749528
ISSN
0169-4332
DOI
10.1016/j.apsusc.2022.155436
language
English
LU publication?
yes
id
fa242c23-9ec0-4d2f-8cfb-b3d0c8d8bf47
date added to LUP
2023-01-23 15:57:46
date last changed
2023-02-17 13:58:59
@article{fa242c23-9ec0-4d2f-8cfb-b3d0c8d8bf47,
  abstract     = {{<p>Self-assembled nanolines are attractive to build the technological devices of next generation, but characterizing their electronic properties is often difficult to achieve. In this work we employ angle-resolved photoemission spectroscopy and density functional theory to clarify the electronic structure exhibited by self-assembled Bi nanolines grown on the InAs(100) surface. A surface resonance associated to the reconstructed ζ(4 × 2) surface is visible in the photoemission spectra before and after the formation of the Bi nanolines. This demonstrates that Bi deposition does not necessarily drive a transition to an unreconstructed surface in the substrate, which is contrary to what was reported in previous studies. In addition, experiment and theory show the presence of a flat band located in the band gap of InAs, just above the valence band maximum. This flat band is associated to the Bi nanolines and possesses a strong orbital character, consistent with its unidimensional nature. These spectral features suggest that Bi nanolines on InAs(100) may have a strongly polarized conductivity, which makes them suitable to be exploited as nanowires in nanotechnology. The coexistence with an accumulation layer suggests an even farther functionalization.</p>}},
  author       = {{Nafday, Dhani and Richter, Christine and Heckmann, Olivier and Wang, Weimin and Mariot, Jean Michel and Djukic, Uros and Vobornik, Ivana and Lefevre, Patrick and Taleb-Ibrahimi, Amina and Bertran, Franco̧is and Rault, Julien and Nicolaï, Laurent and Ong, Chin Shen and Thunström, Patrik and Hricovini, Karol and Minár, Ján and Di Marco, Igor}},
  issn         = {{0169-4332}},
  keywords     = {{Bi nanolines; Density-functional theory; InAs surface; Photoemission spectroscopy; Self-assembly}},
  language     = {{eng}},
  month        = {{02}},
  publisher    = {{Elsevier}},
  series       = {{Applied Surface Science}},
  title        = {{Electronic structure of Bi nanolines on InAs(100)}},
  url          = {{http://dx.doi.org/10.1016/j.apsusc.2022.155436}},
  doi          = {{10.1016/j.apsusc.2022.155436}},
  volume       = {{611}},
  year         = {{2023}},
}