eKMAIR

Influence of the ordering of impurities on the appearance of an energy gap and on the electrical conductance of graphene

Show simple item record

dc.contributor.author Repetsky, Stanislav
dc.contributor.author Vyshyvana, Iryna
dc.contributor.author Kruchinin, Sergei
dc.contributor.author Bellucci, S.
dc.date.accessioned 2019-05-27T14:30:29Z
dc.date.available 2019-05-27T14:30:29Z
dc.date.issued 2018
dc.identifier.citation Influence of the ordering of impurities on the appearance of an energy gap and on the electrical conductance of graphene / S. P. Repetsky, I. G. Vyshyvana, S. P. Kruchinin, S. Bellucci // Scientific Reports. - 2018. - Vol. 8, No. 1. en_US
dc.identifier.uri http://ekmair.ukma.edu.ua/handle/123456789/15722
dc.description.abstract In the one-band model of strong coupling, the infuence of substitutional impurity atoms on the energy spectrum and electrical conductance of graphene is studied. It is established that the ordering of substitutional impurity atoms on nodes of the crystal lattice causes the appearance of a gap in the energy spectrum of graphene with width η|δ| centered at the point yδ, where η is the parameter of ordering, δ is the diference of the scattering potentials of impurity atoms and carbon atoms, and y is the impurity concentration. The maximum value of the parameter of ordering is η = 2y y , ≤ 1/2 max . For the complete ordering of impurity atoms, the energy gap width equals 2 δ y . If the Fermi level falls in the region of the mentioned gap, then the electrical conductance σ 0 αα → at the ordering of graphene, i.e., the metal–dielectric transition arises. If the Fermi level is located outside the gap, then the electrical conductance increases with the parameter of order η by the relation σ y αα ~ − ( ) η 2 1 4 2 −1 . At the concentration y = 1/2, as the ordering of impurity atoms η→1, the electrical conductance of graphene σαα → ∞, i.e., the transition of graphene in the state of ideal electrical conductance arises. en_US
dc.language.iso en en_US
dc.subject energy gap en_US
dc.subject ordering of impurities en_US
dc.subject electrical conductance en_US
dc.subject graphene en_US
dc.subject electrical conductance of graphene en_US
dc.subject article en_US
dc.title Influence of the ordering of impurities on the appearance of an energy gap and on the electrical conductance of graphene en_US
dc.type Article en_US
dc.status published earlier en_US
dc.relation.source Scientific Reports. - 2018. - Vol. 8, No. 1 en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search DSpace


Browse

My Account

Statistics