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Proceedings Paper

A graphene-based non-volatile memory
Author(s): Loïc Loisel; Ange Maurice; Bérengère Lebental; Stefano Vezzoli; Costel-Sorin Cojocaru; Beng Kang Tay
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Paper Abstract

We report on the development and characterization of a simple two-terminal non-volatile graphene switch. After an initial electroforming step during which Joule heating leads to the formation of a nano-gap impeding the current flow, the devices can be switched reversibly between two well-separated resistance states. To do so, either voltage sweeps or pulses can be used, with the condition that VSET < VRESET , where SET is the process decreasing the resistance and RESET the process increasing the resistance. We achieve reversible switching on more than 100 cycles with resistance ratio values of 104. This approach of graphene memory is competitive as compared to other graphene approaches such as redox of graphene oxide, or electro-mechanical switches with suspended graphene. We suggest a switching model based on a planar electro-mechanical switch, whereby electrostatic, elastic and friction forces are competing to switch devices ON and OFF, and the stability in the ON state is achieved by the formation of covalent bonds between the two stretched sides of the graphene, hence bridging the nano-gap. Developing a planar electro-mechanical switch enables to obtain the advantages of electro-mechanical switches while avoiding most of their drawbacks.

Paper Details

Date Published: 16 September 2015
PDF: 8 pages
Proc. SPIE 9552, Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII, 95520R (16 September 2015); doi: 10.1117/12.2188110
Show Author Affiliations
Loïc Loisel, Nanyang Technological Univ. (Singapore)
International NTU Thales Research Alliance, CNRS (Singapore)
LPICM, Ecole Polytechnique, CNRS (France)
Ange Maurice, Nanyang Technological Univ. (Singapore)
International NTU Thales Research Alliance, CNRS (Singapore)
Bérengère Lebental, LPICM, Ecole Polytechnique, CNRS (France)
Univ. Paris-Est, IFSTTAR (France)
Stefano Vezzoli, Nanyang Technological Univ. (Singapore)
Costel-Sorin Cojocaru, LPICM, Ecole Polytechnique, CNRS (France)
Beng Kang Tay, Nanyang Technological Univ. (Singapore)
International NTU Thales Research Alliance, CNRS (Singapore)


Published in SPIE Proceedings Vol. 9552:
Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII
Manijeh Razeghi; Maziar Ghazinejad; Can Bayram; Jae Su Yu; Young Hee Lee, Editor(s)

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