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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2011

Giant surface charge density of graphene resolved from scanning tunneling microscopy and first-principles theory

Résumé

In this work, systematic constant-bias, variable-current scanning tunneling microscopy (STM) measurements and STM simulations from density-functional theory are carried out, yielding critical insights into the spatial structure of electrons in graphene. A foundational comparison is drawn between graphene and graphite, showing the surface charge density of graphene to be 300% that of graphite. Furthermore, simulated STM images reveal that high-current STM better resolves graphene's honeycomb bonding structure because of a retraction which occurs in the topmost dangling bond orbitals. © 2011 American Physical Society.

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Matériaux

Dates et versions

hal-02277384 , version 1 (03-09-2019)

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Citer

P. Xu, Y. Yang, S.D. Barber, M.L. Ackerman, J.K. Schoelz, et al.. Giant surface charge density of graphene resolved from scanning tunneling microscopy and first-principles theory. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2011, 84 (16), pp.161409. ⟨10.1103/PhysRevB.84.161409⟩. ⟨hal-02277384⟩
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