Ambipolar charge transport in quasi-free-standing monolayer graphene on SiC obtained by gold intercalation
(2020) In Physical Review B 102(16).- Abstract
We present a study of quasi-free-standing monolayer graphene obtained by intercalation of Au atoms at the interface between the carbon buffer layer (Bu-L) and the silicon-terminated face (0001) of 4H-silicon carbide. Au intercalation is achieved by deposition of an atomically thin Au layer on the Bu-L followed by annealing at 850 °C in an argon atmosphere. We explore the intercalation of Au and decoupling of the Bu-L into quasi-free-standing monolayer graphene by surface science characterization and electron transport in top-gated electronic devices. By gate-dependent magnetotransport we find that the Au-intercalated buffer layer displays all properties of monolayer graphene, namely gate-tunable ambipolar transport across the Dirac... (More)
We present a study of quasi-free-standing monolayer graphene obtained by intercalation of Au atoms at the interface between the carbon buffer layer (Bu-L) and the silicon-terminated face (0001) of 4H-silicon carbide. Au intercalation is achieved by deposition of an atomically thin Au layer on the Bu-L followed by annealing at 850 °C in an argon atmosphere. We explore the intercalation of Au and decoupling of the Bu-L into quasi-free-standing monolayer graphene by surface science characterization and electron transport in top-gated electronic devices. By gate-dependent magnetotransport we find that the Au-intercalated buffer layer displays all properties of monolayer graphene, namely gate-tunable ambipolar transport across the Dirac point, but we find no observable enhancement of spin-orbit effects in the graphene layer, despite its proximity to the intercalated Au layer.
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- author
- Kim, Kyung Ho ; He, Hans ; Struzzi, Claudia LU ; Zakharov, Alexei LU ; Giusca, Cristina E. ; Tzalenchuk, Alexander ; Park, Yung Woo ; Yakimova, Rositsa ; Kubatkin, Sergey and Lara-Avila, Samuel
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B
- volume
- 102
- issue
- 16
- article number
- 165403
- publisher
- American Physical Society
- external identifiers
-
- scopus:85094890297
- ISSN
- 2469-9950
- DOI
- 10.1103/PhysRevB.102.165403
- language
- English
- LU publication?
- yes
- id
- 95d1bbef-31bd-4836-97eb-2f5d3b157abc
- date added to LUP
- 2021-01-07 15:03:12
- date last changed
- 2022-04-26 23:08:35
@article{95d1bbef-31bd-4836-97eb-2f5d3b157abc, abstract = {{<p>We present a study of quasi-free-standing monolayer graphene obtained by intercalation of Au atoms at the interface between the carbon buffer layer (Bu-L) and the silicon-terminated face (0001) of 4H-silicon carbide. Au intercalation is achieved by deposition of an atomically thin Au layer on the Bu-L followed by annealing at 850 °C in an argon atmosphere. We explore the intercalation of Au and decoupling of the Bu-L into quasi-free-standing monolayer graphene by surface science characterization and electron transport in top-gated electronic devices. By gate-dependent magnetotransport we find that the Au-intercalated buffer layer displays all properties of monolayer graphene, namely gate-tunable ambipolar transport across the Dirac point, but we find no observable enhancement of spin-orbit effects in the graphene layer, despite its proximity to the intercalated Au layer. </p>}}, author = {{Kim, Kyung Ho and He, Hans and Struzzi, Claudia and Zakharov, Alexei and Giusca, Cristina E. and Tzalenchuk, Alexander and Park, Yung Woo and Yakimova, Rositsa and Kubatkin, Sergey and Lara-Avila, Samuel}}, issn = {{2469-9950}}, language = {{eng}}, number = {{16}}, publisher = {{American Physical Society}}, series = {{Physical Review B}}, title = {{Ambipolar charge transport in quasi-free-standing monolayer graphene on SiC obtained by gold intercalation}}, url = {{http://dx.doi.org/10.1103/PhysRevB.102.165403}}, doi = {{10.1103/PhysRevB.102.165403}}, volume = {{102}}, year = {{2020}}, }