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Title: A graphene-based non-volatile memory
Authors: Loisel, Loïc
Maurice, Ange
Lebental, Bérengère
Vezzoli, Stefano
Cojocaru, Costel-Sorin
Tay, Beng Kang
Keywords: DRNTU::Engineering::Electrical and electronic engineering
Electro-Mechanical Switch
Issue Date: 2015
Source: Loisel, L., Maurice, A., Lebental, B., Vezzoli, S., Cojocaru, C.-S., & Tay, B. K. (2015). A graphene-based non-volatile memory. Proceedings of SPIE - Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII, 9552, 95520R-. doi:10.1117/12.2188110
metadata.dc.contributor.conference: Proceedings of SPIE - Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII
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.
DOI: 10.1117/12.2188110
Schools: School of Electrical and Electronic Engineering 
Research Centres: Centre for Disruptive Photonic Technologies (CDPT) 
Rights: © 2015 Society of Photo-optical Instrumentation Engineers (SPIE). This paper was published in Proceedings of SPIE - Carbon Nanotubes, Graphene, and Emerging 2D Materials for Electronic and Photonic Devices VIII and is made available as an electronic reprint (preprint) with permission of Society of Photo-optical Instrumentation Engineers (SPIE). The published version is available at: []. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Conference Papers

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