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GHz nanomechanical resonator in an ultraclean suspended graphene p-n junction

Jung, Minkyung and Rickhaus, Peter and Zihlmann, Simon and Eichler, Alexander and Makk, Peter and Schönenberger, Christian . (2019) GHz nanomechanical resonator in an ultraclean suspended graphene p-n junction. Nanoscale, 11 (10). pp. 4355-4361.

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Official URL: https://edoc.unibas.ch/71999/

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Abstract

We demonstrate high-frequency mechanical resonators in ballistic graphene p-n junctions. Fully suspended graphene devices with two bottom gates exhibit ballistic bipolar behavior after current annealing. We determine the graphene mass density and built-in tension for different current annealing steps by comparing the measured mechanical resonant response to a simplified membrane model. In a graphene membrane with high built-in tension, but still of macroscopic size with dimensions 3 x 1 m(2), a record resonance frequency of 1.17 GHz is observed after the final current annealing step. We further compare the resonance response measured in the unipolar with the one in the bipolar regime. Remarkably, the resonant signals are strongly enhanced in the bipolar regime.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Jung, Minkyung and Rickhaus, Peter and Zihlmann, Simon and Makk, Peter and Schönenberger, Christian
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Royal Society of Chemistry
ISSN:2040-3364 eISSN: 2040-3372
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
Identification Number:
Last Modified:18 Sep 2019 08:29
Deposited On:18 Sep 2019 08:29

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