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Dynamic gap generation in graphene under the long-range Coulomb interaction



Dynamic gap generation in graphene under the long-range Coulomb interaction



Journal of Physics. Condensed Matter 23(34): 345601



Dynamic gap generation in graphene under the long-range Coulomb interaction is studied by the Dyson-Schwinger gap equation beyond the instantaneous approximation. Once the dependence of the dynamic gap on the energy has been considered, the critical interaction strength α(c) decreases to 0.542. If the renormalization of the fermion velocity is considered, α(c) will become α(c) = 1.02. This indicates that the dependence on the energy and the renormalization of the fermion velocity are both important for dynamic gap generation in graphene under long-range Coulomb interaction.

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Accession: 052734973

Download citation: RISBibTeXText

PMID: 21841220

DOI: 10.1088/0953-8984/23/34/345601


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