Electronic structure of Bi nanolines on InAs(100)
(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)
- author
- organization
- publishing date
- 2023-02-15
- 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}}, }