Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation
Intercalation is a promising approach for tailoring the electronic structure of epitaxial graphene on SiC. It enables the formation of otherwise unstable 2D phases of elements and allows the investigation of the interplay between the 2D materials and the substrate. Detailed studies have been conduct...
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Wiley-VCH
2025-01-01
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| Series: | Small Structures |
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| Online Access: | https://doi.org/10.1002/sstr.202400338 |
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| author | Franziska Schölzel Peter Richter Andres David Peña Unigarro Susanne Wolff Holger Schwarz Adrian Schütze Niels Rösch Sibylle Gemming Thomas Seyller Philip Schädlich |
| author_facet | Franziska Schölzel Peter Richter Andres David Peña Unigarro Susanne Wolff Holger Schwarz Adrian Schütze Niels Rösch Sibylle Gemming Thomas Seyller Philip Schädlich |
| author_sort | Franziska Schölzel |
| collection | DOAJ |
| description | Intercalation is a promising approach for tailoring the electronic structure of epitaxial graphene on SiC. It enables the formation of otherwise unstable 2D phases of elements and allows the investigation of the interplay between the 2D materials and the substrate. Detailed studies have been conducted on the Pb intercalation process, as well as the structure and electronic properties of the 2D Pb layer using low‐energy electron microscopy and photoelectron spectroscopy. The low‐energy bands of Pb show good agreement with density‐functional theory calculations. A uniform Pb intercalation layer with (1 × 1) periodicity with respect to the SiC substrate is found. The quasifreestanding graphene is effectively screened from the doping influence of the substrate, leading to charge neutrality. Instead, the 2D Pb layer compensates for the spontaneous polarization of the substrate, allowing for the doping of a metal layer under cover. A phase transformation from the (1 × 1) intercalation phase into a bubble phase with quasi‐tenfold periodicity with respect to graphene occurs if the system is provided with sufficient energy. These results experimentally quantify the interaction between the 2D Pb layer, the substrate, and the graphene layer, demonstrating a first step toward controlling the diversity of 2D Pb phases. |
| format | Article |
| id | doaj-art-6f8b8114a64848a79a2fed2b557b403e |
| institution | Kabale University |
| issn | 2688-4062 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Structures |
| spelling | doaj-art-6f8b8114a64848a79a2fed2b557b403e2025-01-10T17:54:14ZengWiley-VCHSmall Structures2688-40622025-01-0161n/an/a10.1002/sstr.202400338Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase TransformationFranziska Schölzel0Peter Richter1Andres David Peña Unigarro2Susanne Wolff3Holger Schwarz4Adrian Schütze5Niels Rösch6Sibylle Gemming7Thomas Seyller8Philip Schädlich9Institute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyInstitute of Physics Chemnitz University of Technology Reichenhainer Straße 70 09126 Chemnitz GermanyIntercalation is a promising approach for tailoring the electronic structure of epitaxial graphene on SiC. It enables the formation of otherwise unstable 2D phases of elements and allows the investigation of the interplay between the 2D materials and the substrate. Detailed studies have been conducted on the Pb intercalation process, as well as the structure and electronic properties of the 2D Pb layer using low‐energy electron microscopy and photoelectron spectroscopy. The low‐energy bands of Pb show good agreement with density‐functional theory calculations. A uniform Pb intercalation layer with (1 × 1) periodicity with respect to the SiC substrate is found. The quasifreestanding graphene is effectively screened from the doping influence of the substrate, leading to charge neutrality. Instead, the 2D Pb layer compensates for the spontaneous polarization of the substrate, allowing for the doping of a metal layer under cover. A phase transformation from the (1 × 1) intercalation phase into a bubble phase with quasi‐tenfold periodicity with respect to graphene occurs if the system is provided with sufficient energy. These results experimentally quantify the interaction between the 2D Pb layer, the substrate, and the graphene layer, demonstrating a first step toward controlling the diversity of 2D Pb phases.https://doi.org/10.1002/sstr.202400338confinement epitaxiesepitaxial graphenesintercalationsspontaneous polarization |
| spellingShingle | Franziska Schölzel Peter Richter Andres David Peña Unigarro Susanne Wolff Holger Schwarz Adrian Schütze Niels Rösch Sibylle Gemming Thomas Seyller Philip Schädlich Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation Small Structures confinement epitaxies epitaxial graphenes intercalations spontaneous polarization |
| title | Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation |
| title_full | Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation |
| title_fullStr | Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation |
| title_full_unstemmed | Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation |
| title_short | Large‐Area Lead Monolayers under Cover: Intercalation, Doping, and Phase Transformation |
| title_sort | large area lead monolayers under cover intercalation doping and phase transformation |
| topic | confinement epitaxies epitaxial graphenes intercalations spontaneous polarization |
| url | https://doi.org/10.1002/sstr.202400338 |
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