This title appears in the Scientific Report :
2014
Please use the identifier:
http://dx.doi.org/10.1088/0957-4484/24/44/444001 in citations.
Graphene-based charge sensors
Graphene-based charge sensors
We discuss graphene nanoribbon-based charge sensors and focus on their functionality in the presence of external magnetic fields and high frequency pulses applied to a nearby gate electrode. The charge detectors work well with in-plane magnetic fields of up to 7 T and pulse frequencies of up to 20 M...
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Personal Name(s): | Neumann, C. (Corresponding Author) |
---|---|
Volk, C. / Engels, S. / Stampfer, C. | |
Contributing Institute: |
JARA-FIT; JARA-FIT Halbleiter-Nanoelektronik; PGI-9 |
Published in: | Nanotechnology, 24 (2013) 44, S. 444001 - |
Imprint: |
Bristol
IOP Publ.
2013
|
DOI: |
10.1088/0957-4484/24/44/444001 |
PubMed ID: |
24113720 |
Document Type: |
Journal Article |
Research Program: |
Frontiers of charge based Electronics |
Publikationsportal JuSER |
We discuss graphene nanoribbon-based charge sensors and focus on their functionality in the presence of external magnetic fields and high frequency pulses applied to a nearby gate electrode. The charge detectors work well with in-plane magnetic fields of up to 7 T and pulse frequencies of up to 20 MHz. By analyzing the step height in the charge detector's current at individual charging events in a nearby quantum dot, we determine the ideal operation conditions with respect to the applied charge detector bias. Average charge sensitivities of 1.3 × 10−3e Hz−1/2 can be achieved. Additionally, we investigate the back action of the charge detector current on the quantum transport through a nearby quantum dot. By varying the charge detector bias from 0 to 4.5 mV, we can increase the Coulomb peak currents measured at the quantum dot by a factor of around 400. Furthermore, we can completely lift the Coulomb blockade in the quantum dot. |