Gate-defined graphene double quantum dot and excited state spectroscopy.
A double quantum dot is formed in a graphene nanoribbon device using three top gates. These gates independently change the number of electrons on each dot and tune the interdot coupling. Transport through excited states is observed in the weakly coupled double dot regime. We extract from the measurements all relevant capacitances of the double dot system, as well as the quantized level spacing.
Liu
Xing Lan
XL
Kavli Institute of Nanoscience, Delft University of Technology, Delft, The Netherlands. xinglan.liu@tudelft.nl
Hug
Dorothee
D
Vandersypen
Lieven M K
LM
D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D045663:Quantum Dots; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
D006108:Graphite