Semiconductor to metal transition in two-dimensional gold and its van der Waals heterostack with graphene
(2020) In Nature Communications 11(1).- Abstract
The synthesis of two-dimensional (2D) transition metals has attracted growing attention for both fundamental and application-oriented investigations, such as 2D magnetism, nanoplasmonics and non-linear optics. However, the large-area synthesis of this class of materials in a single-layer form poses non-trivial difficulties. Here we present the synthesis of a large-area 2D gold layer, stabilized in between silicon carbide and monolayer graphene. We show that the 2D-Au ML is a semiconductor with the valence band maximum 50 meV below the Fermi level. The graphene and gold layers are largely non-interacting, thereby defining a class of van der Waals heterostructure. The 2D-Au bands, exhibit a 225 meV spin-orbit splitting along the Γ K ¯... (More)
The synthesis of two-dimensional (2D) transition metals has attracted growing attention for both fundamental and application-oriented investigations, such as 2D magnetism, nanoplasmonics and non-linear optics. However, the large-area synthesis of this class of materials in a single-layer form poses non-trivial difficulties. Here we present the synthesis of a large-area 2D gold layer, stabilized in between silicon carbide and monolayer graphene. We show that the 2D-Au ML is a semiconductor with the valence band maximum 50 meV below the Fermi level. The graphene and gold layers are largely non-interacting, thereby defining a class of van der Waals heterostructure. The 2D-Au bands, exhibit a 225 meV spin-orbit splitting along the Γ K ¯ direction, making it appealing for spin-related applications. By tuning the amount of gold at the SiC/graphene interface, we induce a semiconductor to metal transition in the 2D-Au, which has not yet been observed and hosts great interest for fundamental physics.
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- author
- Forti, Stiven ; Link, Stefan ; Stöhr, Alexander ; Niu, Yuran LU ; Zakharov, Alexei A. LU ; Coletti, Camilla and Starke, Ulrich
- organization
- publishing date
- 2020-05-06
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 11
- issue
- 1
- article number
- 2236
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:32376867
- scopus:85084394838
- ISSN
- 2041-1723
- DOI
- 10.1038/s41467-020-15683-1
- language
- English
- LU publication?
- yes
- id
- fd10edef-f3bb-40b7-afec-e1ea2c2eacd1
- date added to LUP
- 2020-06-09 10:09:42
- date last changed
- 2024-09-04 22:37:12
@article{fd10edef-f3bb-40b7-afec-e1ea2c2eacd1, abstract = {{<p>The synthesis of two-dimensional (2D) transition metals has attracted growing attention for both fundamental and application-oriented investigations, such as 2D magnetism, nanoplasmonics and non-linear optics. However, the large-area synthesis of this class of materials in a single-layer form poses non-trivial difficulties. Here we present the synthesis of a large-area 2D gold layer, stabilized in between silicon carbide and monolayer graphene. We show that the 2D-Au ML is a semiconductor with the valence band maximum 50 meV below the Fermi level. The graphene and gold layers are largely non-interacting, thereby defining a class of van der Waals heterostructure. The 2D-Au bands, exhibit a 225 meV spin-orbit splitting along the Γ K ¯ direction, making it appealing for spin-related applications. By tuning the amount of gold at the SiC/graphene interface, we induce a semiconductor to metal transition in the 2D-Au, which has not yet been observed and hosts great interest for fundamental physics.</p>}}, author = {{Forti, Stiven and Link, Stefan and Stöhr, Alexander and Niu, Yuran and Zakharov, Alexei A. and Coletti, Camilla and Starke, Ulrich}}, issn = {{2041-1723}}, language = {{eng}}, month = {{05}}, number = {{1}}, publisher = {{Nature Publishing Group}}, series = {{Nature Communications}}, title = {{Semiconductor to metal transition in two-dimensional gold and its van der Waals heterostack with graphene}}, url = {{http://dx.doi.org/10.1038/s41467-020-15683-1}}, doi = {{10.1038/s41467-020-15683-1}}, volume = {{11}}, year = {{2020}}, }