TY  - JOUR
AU  - Jolie, Wouter
AU  - Craes, Fabian
AU  - Petrović, Marin
AU  - Atodiresei, Nicolae
AU  - Caciuc, Vasile
AU  - Blügel, Stefan
AU  - Kralj, Marko
AU  - Michely, Thomas
AU  - Busse, Carsten
TI  - Confinement of Dirac electrons in graphene quantum dots
JO  - Physical review / B
VL  - 89
IS  - 15
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2014-03467
SP  - 155435
PY  - 2014
AB  - 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].
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000335228300004
DO  - DOI:10.1103/PhysRevB.89.155435
UR  - https://juser.fz-juelich.de/record/154065
ER  -