Domain Boundary Formation Within an Intercalated Pb Monolayer Featuring Charge-Neutral Epitaxial Graphene
(2023) In Advanced Materials Interfaces 10(27).- Abstract
The synthesis of new graphene-based quantum materials by intercalation is an auspicious approach. However, an accompanying proximity coupling depends crucially on the structural details of the new heterostructure. It is studied in detail the Pb monolayer structure after intercalation into the graphene buffer layer on the SiC(0001) interface by means of photoelectron spectroscopy, x-ray standing waves, and scanning tunneling microscopy. A coherent fraction close to unity proves the formation of a flat Pb monolayer on the SiC surface. An interlayer distance of 3.67 Å to the suspended graphene underlines the formation of a truly van der Waals heterostructure. The 2D Pb layer reveals a quasi ten-fold periodicity due to the formation of a... (More)
The synthesis of new graphene-based quantum materials by intercalation is an auspicious approach. However, an accompanying proximity coupling depends crucially on the structural details of the new heterostructure. It is studied in detail the Pb monolayer structure after intercalation into the graphene buffer layer on the SiC(0001) interface by means of photoelectron spectroscopy, x-ray standing waves, and scanning tunneling microscopy. A coherent fraction close to unity proves the formation of a flat Pb monolayer on the SiC surface. An interlayer distance of 3.67 Å to the suspended graphene underlines the formation of a truly van der Waals heterostructure. The 2D Pb layer reveals a quasi ten-fold periodicity due to the formation of a grain boundary network, ensuring the saturation of the Si surface bonds. Moreover, the densely-packed Pb layer also efficiently minimizes the doping influence by the SiC substrate, both from the surface dangling bonds and the SiC surface polarization, giving rise to charge-neutral monolayer graphene. The observation of a long-ranged ((Formula presented.)) reconstruction on the graphene lattice at tunneling conditions close to Fermi energy is most likely a result of a nesting condition to be perfectly fulfilled.
(Less)
- author
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- angle-resolved photoelectron sprectroscopy, charge-neutral epitaxial graphene, low energy electron diffraction, normal incidence x-ray standing wave, Pb monolayer intercalation, scanning tunneling microscopy, X-ray photoelectron spectroscopy
- in
- Advanced Materials Interfaces
- volume
- 10
- issue
- 27
- publisher
- John Wiley & Sons Inc.
- external identifiers
-
- scopus:85165483522
- ISSN
- 2196-7350
- DOI
- 10.1002/admi.202300471
- language
- English
- LU publication?
- yes
- id
- 8469bb5d-fd1e-4eef-92fe-8431eed51f26
- date added to LUP
- 2023-09-19 10:50:22
- date last changed
- 2023-10-26 15:03:06
@article{8469bb5d-fd1e-4eef-92fe-8431eed51f26,
abstract = {{<p>The synthesis of new graphene-based quantum materials by intercalation is an auspicious approach. However, an accompanying proximity coupling depends crucially on the structural details of the new heterostructure. It is studied in detail the Pb monolayer structure after intercalation into the graphene buffer layer on the SiC(0001) interface by means of photoelectron spectroscopy, x-ray standing waves, and scanning tunneling microscopy. A coherent fraction close to unity proves the formation of a flat Pb monolayer on the SiC surface. An interlayer distance of 3.67 Å to the suspended graphene underlines the formation of a truly van der Waals heterostructure. The 2D Pb layer reveals a quasi ten-fold periodicity due to the formation of a grain boundary network, ensuring the saturation of the Si surface bonds. Moreover, the densely-packed Pb layer also efficiently minimizes the doping influence by the SiC substrate, both from the surface dangling bonds and the SiC surface polarization, giving rise to charge-neutral monolayer graphene. The observation of a long-ranged ((Formula presented.)) reconstruction on the graphene lattice at tunneling conditions close to Fermi energy is most likely a result of a nesting condition to be perfectly fulfilled.</p>}},
author = {{Schädlich, Philip and Ghosal, Chitran and Stettner, Monja and Matta, Bharti and Wolff, Susanne and Schölzel, Franziska and Richter, Peter and Hutter, Mark and Haags, Anja and Wenzel, Sabine and Mamiyev, Zamin and Koch, Julian and Soubatch, Serguei and Rosenzweig, Philipp and Polley, Craig and Tautz, Frank Stefan and Kumpf, Christian and Küster, Kathrin and Starke, Ulrich and Seyller, Thomas and Bocquet, Francois C. and Tegenkamp, Christoph}},
issn = {{2196-7350}},
keywords = {{angle-resolved photoelectron sprectroscopy; charge-neutral epitaxial graphene; low energy electron diffraction; normal incidence x-ray standing wave; Pb monolayer intercalation; scanning tunneling microscopy; X-ray photoelectron spectroscopy}},
language = {{eng}},
number = {{27}},
publisher = {{John Wiley & Sons Inc.}},
series = {{Advanced Materials Interfaces}},
title = {{Domain Boundary Formation Within an Intercalated Pb Monolayer Featuring Charge-Neutral Epitaxial Graphene}},
url = {{http://dx.doi.org/10.1002/admi.202300471}},
doi = {{10.1002/admi.202300471}},
volume = {{10}},
year = {{2023}},
}