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Surface potential variations in epitaxial graphene devices investigated by Electrostatic Force Spectroscopy

V. Panchal ; T. L. Burnett ; R. Pearce ; Karin Cedergren (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; R. Yakimova ; A. Tzalenchuk ; O. Kazakova
Proceedings of the IEEE Conference on Nanotechnology: 2012 12th IEEE International Conference on Nanotechnology, NANO 2012;Birmingham;20 August 2012through23 August 2012 (1944-9399). (2012)
[Konferensbidrag, refereegranskat]

Electrostatic Force Spectroscopy and Scanning Kelvin Probe Microscopy techniques are used to study the performance of side-gated Hall devices made of epitaxial graphene on 4H-SiC(0001). Electrostatic Force Spectroscopy is a novel method which allows quantitative surface potential measurements with high spatial resolution. Using these techniques, we calibrate work function of the metal coated tip and define the work functions for single and double-layer graphene. We also show that the use of moderate strength electrical fields in the side-gate geometry does not notably change the performance of the device.



Denna post skapades 2012-12-11. Senast ändrad 2015-02-18.
CPL Pubid: 167466

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Fysik

Chalmers infrastruktur