What question did this study set out to answer?

To classify the generic electronic miniband structures of graphene placed on substrates with hexagonal Bravais symmetry using a symmetry-based framework.

June 4, 2013Physical Review BOpen Access

Generic miniband structure of graphene on a hexagonal substrate

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To classify the generic electronic miniband structures of graphene placed on substrates with hexagonal Bravais symmetry using a symmetry-based framework.
Applied a general symmetry-based theoretical approach to model electron dispersion in graphene atop hexagonal substrates.
Evaluated spectral isolation conditions for the primary moiré miniband and its corresponding mini Dirac points.
Identified symmetry conditions where the first moiré miniband is separated from higher-energy spectra by either one or three isolated mini Dirac points without dispersion overlap.
Demonstrated that these isolated miniband configurations cause the Hall coefficient to undergo two distinct sign reversals as charge carrier density changes.

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Implication

Theoretical study reveals conditions for isolated mini Dirac points and Hall coefficient sign reversals in graphene on hexagonal substrates, indicating tunable electronic transport properties.

Cite This Study

Wallbank et al. (2013) studied this question.

synapsesocial.com/papers/6a7598961cd7cac2185fff79 https://doi.org/10.1103/physrevb.87.245408

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Implication

Theoretical study reveals conditions for isolated mini Dirac points and Hall coefficient sign reversals in graphene on hexagonal substrates, indicating tunable electronic transport properties.

Generic miniband structure of graphene on a hexagonal substrate

Key Points

Discussion

Implication

Cite This Study

Generic miniband structure of graphene on a hexagonal substrate

Key Points

Discussion

Implication

Cite This Study

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