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

Description:

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

Creator(s):
Creation Date: June 5, 2012
Partner(s):
UNT College of Arts and Sciences
Collection(s):
UNT Scholarly Works
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Total Uses: 57
Past 30 days: 5
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Sidorov, Anton N.

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Publisher Info:
Place of Publication: [College Park, Maryland]
Date(s):
  • Creation: June 5, 2012
Description:

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

Degree:
Department: Physics
Department: Chemistry
Note:

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

Note:

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.

Physical Description:

6 p.

Language(s):
Subject(s):
Keyword(s): ab initio calculations | charge transfer states | electrical conductivity | graphene | thermoelectric power
Source: Journal of Applied Physics, 2012, College Park: American Institute of Physics
Partner:
UNT College of Arts and Sciences
Collection:
UNT Scholarly Works
Identifier:
  • DOI: 10.1063/1.4725413
  • ARK: ark:/67531/metadc132974
Resource Type: Article
Format: Text
Rights:
Access: Public
Citation:
Publication Title: Journal of Applied Physics
Volume: 111
Issue: 11
Peer Reviewed: Yes