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  Approaching Truly Freestanding Graphene: The Structure of Hydrogen-Intercalated Graphene on 6H-SiC(0001)

Sforzini, J., Nemec, L., Denig, T., Stadtmüller, B., Lee, T.-L., Kumpf, C., et al. (2015). Approaching Truly Freestanding Graphene: The Structure of Hydrogen-Intercalated Graphene on 6H-SiC(0001). Physical Review Letters, 114(10): 106804. doi:10.1103/PhysRevLett.114.106804.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0025-6CD7-4 Version Permalink: https://hdl.handle.net/11858/00-001M-0000-002C-AB3F-E
Genre: Journal Article

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PhysRevLett.114.106804.pdf (Publisher version), 604KB
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2015
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APS
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 Creators:
Sforzini, J.1, 2, Author
Nemec, Lydia3, Author           
Denig, T.4, Author
Stadtmüller, B.1, 2, Author
Lee, T.-L.5, Author
Kumpf, C.1, 2, Author
Soubatch, S.1, 2, Author
Starke, U.4, Author
Rinke, Patrick3, 6, Author           
Blum, Volker3, 7, Author           
Bocquet, F. C.1, 2, Author
Tautz, F. S.1, 2, Author
Affiliations:
1Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany, ou_persistent22              
2Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany, ou_persistent22              
3Theory, Fritz Haber Institute, Max Planck Society, ou_634547              
4Max Planck Institute for Solid State Research, Heisenbergstraße, 70569 Stuttgart, Germany, ou_persistent22              
5Diamond Light Source Ltd, Didcot, OX110DE Oxfordshire, United Kingdom, ou_persistent22              
6COMP/Department of Applied Physics, Aalto University, P.O. Box 11100, Aalto FI-00076, Finland, ou_persistent22              
7Duke University, MEMS Department, Durham, NC 27708, USA, ou_persistent22              

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 Abstract: We measure the adsorption height of hydrogen-intercalated quasifreestanding monolayer graphene on the (0001) face of 6H silicon carbide by the normal incidence x-ray standing wave technique. A density functional calculation for the full (63√×63√)−R30° unit cell, based on a van der Waals corrected exchange correlation functional, finds a purely physisorptive adsorption height in excellent agreement with experiments, a very low buckling of the graphene layer, a very homogeneous electron density at the interface, and the lowest known adsorption energy per atom for graphene on any substrate. A structural comparison to other graphenes suggests that hydrogen-intercalated graphene on 6H−SiC(0001) approaches ideal graphene.

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Language(s): eng - English
 Dates: 2014-11-132015-03-102015-03-10
 Publication Status: Issued
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.114.106804
 Degree: -

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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 114 (10) Sequence Number: 106804 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1