2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/146905The ground state energy of current carriers in graphene considered as a zero-gap semiconductor was calculated in the two-band approximation. The condition of the electronic (hole) system stability in graphene was obtained. The possibility of the zero-gap semiconductor-semimetal transition was discussed.9 pages, 5 figuresOther Condensed MatterMaterials Sciencetext