Charge transfer equilibria in ambient-exposed epitaxial graphene on (0001) 6 H-SiC

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Article discussing research on charge transfer equilibria in ambient-exposed epitaxial graphene on (0001) 6 H-SiC.

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6 p.

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Sidorov, Anton N.; Gaskill, D. Kurt.; Buongiorno Nardelli, Marco; Tedesco, Joseph L.; Myers-Ward, Rachel L.; Eddy, Charles R. et al. June 5, 2012.

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Article discussing research on charge transfer equilibria in ambient-exposed epitaxial graphene on (0001) 6 H-SiC.

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6 p.

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Copyright 2012 American Institute of Physics. The Journal of Applied Physics, 111, 113706, http://dx.doi.org/10.1063/1.4725413

Abstract: The transport properties of electronic materials have been long interpreted independently from both the underlying bulk-like behavior of the substrate or the influence of ambient gases. This is no longer the case for ultra-thin graphene whose properties are dominated by the interfaces between the active material and its surroundings. Here, the authors show that the graphene interactions with its environments are critical for the electrostatic and electrochemical equilibrium of the active device layers and their transport properties. Based on the prototypical case of epitaxial graphene on (0001) 6 H-SiC and using a combination of 'in-situ' thermoelectric power and resistance measurements and simulations from first principles, the authors demonstrate that the cooperative occurrence of an electrochemically mediated charge transfer from the graphene to air, combined with the peculiar electronic structure of the graphene/SiC interface, explains the wide variation of measured conductivity and charge carrier type found in prior reports.

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  • Journal of Applied Physics, 2012, College Park: American Institute of Physics

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  • Publication Title: Journal of Applied Physics
  • Volume: 111
  • Issue: 11
  • Peer Reviewed: Yes

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UNT Scholarly Works

The Scholarly Works Collection is home to materials from the University of North Texas community's research, creative, and scholarly activities and serves as UNT's Open Access Repository. It brings together articles, papers, artwork, music, research data, reports, presentations, and other scholarly and creative products representing the expertise in our university community.** Access to some items in this collection may be restricted.**

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  • June 5, 2012

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  • Jan. 16, 2013, 12:47 p.m.

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  • May 12, 2014, 2:52 p.m.

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Sidorov, Anton N.; Gaskill, D. Kurt.; Buongiorno Nardelli, Marco; Tedesco, Joseph L.; Myers-Ward, Rachel L.; Eddy, Charles R. et al. Charge transfer equilibria in ambient-exposed epitaxial graphene on (0001) 6 H-SiC, article, June 5, 2012; [College Park, Maryland]. (digital.library.unt.edu/ark:/67531/metadc132974/: accessed March 27, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT College of Arts and Sciences.