This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1103/PhysRevB.89.155435 in citations.
Please use the identifier: http://hdl.handle.net/2128/9125 in citations.
Confinement of Dirac electrons in graphene quantum dots
Confinement of Dirac electrons in graphene quantum dots
We observe spatial confinement of Dirac states on epitaxial graphene quantum dots with low-temperature scanning tunneling microscopy after using oxygen as an intercalant to suppress the surface state of Ir(111) and to effectively decouple graphene from its metal substrate. We analyze the confined el...
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Personal Name(s): | Jolie, Wouter (Corresponding Author) |
---|---|
Craes, Fabian / Petrović, Marin / Atodiresei, Nicolae / Caciuc, Vasile / Blügel, Stefan / Kralj, Marko / Michely, Thomas / Busse, Carsten | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 Quanten-Theorie der Materialien; PGI-1 |
Published in: | Physical Review B Physical review / B, 89 89 (2014 2014) 15 15, S. 155435 155435 |
Imprint: |
College Park, Md.
APS
2014
|
DOI: |
10.1103/PhysRevB.89.155435 |
Document Type: |
Journal Article |
Research Program: |
Spin-based and quantum information |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/9125 in citations.
We observe spatial confinement of Dirac states on epitaxial graphene quantum dots with low-temperature scanning tunneling microscopy after using oxygen as an intercalant to suppress the surface state of Ir(111) and to effectively decouple graphene from its metal substrate. We analyze the confined electronic states with a relativistic particle-in-a-box model and find a linear dispersion relation. The oxygen-intercalated graphene is p doped [ED=(0.64±0.07) eV] and has a Fermi velocity close to the one of free-standing graphene [vF=(0.96±0.07)×106 m/s]. |