TY  - JOUR
AU  - Sforzini, J.
AU  - Nemec, L.
AU  - Denig, T.
AU  - Stadtmüller, B.
AU  - Lee, T.-L.
AU  - Kumpf, C.
AU  - Subach, Sergey
AU  - Starke, U.
AU  - Rinke, P.
AU  - Blum, V.
AU  - Posseik, Francois
AU  - Tautz, Frank Stefan
TI  - Approaching Truly Freestanding Graphene: The Structure of Hydrogen-Intercalated Graphene on 6H−SiC(0001)
JO  - Physical review letters
VL  - 114
IS  - 10
SN  - 1079-7114
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2015-01932
SP  - 106804
PY  - 2015
AB  - We measure the adsorption height of hydrogen-intercalated quasifreestanding monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calculation for the full (63√×63√)−R30° unit cell, based on a van der Waals corrected exchange correlation functional, finds a purely physisorptive adsorption height in excellent agreement with experiments, a very low buckling of the graphene layer, a very homogeneous electron density at the interface, and the lowest known adsorption energy per atom for graphene on any substrate. A structural comparison to other graphenes suggests that hydrogen-intercalated graphene on 6H−SiC(0001) approaches ideal graphene.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000352073400018
C6  - pmid:25815955
DO  - DOI:10.1103/PhysRevLett.114.106804
UR  - https://juser.fz-juelich.de/record/188581
ER  -