Spin- and charge-polarized states in nanographene ribbons with zigzag edges
Spin- and charge-polarized states in nanographene ribbons with zigzag edges
Effects of the nearest-neighbor Coulomb interaction on nanographene ribbons with zigzag edges are investigated using the extended Hubbard model within the unrestricted Hartree-Fock approximation. The nearest Coulomb interaction stabilizes an electronic state with the opposite electric charges separated and localized along both edges, resulting in a finite electric dipole moment …