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Energy Gaps in Graphene Nanoribbons
Young-Woo Son, Marvin L. Cohen, Steven G. Louie
Based on a first-principles approach, we present scaling rules for the band gaps of graphene nanoribbons (GNRs) as a function of their widths. The GNRs considered have either armch…
Half-Metallic Graphene Nanoribbons
Young-Woo Son, Marvin L. Cohen, Steven G. Louie
Electrical current can be completely spin polarized in a class of materials known as half-metals, as a result of the coexistence of metallic nature for electrons with one spin orie…
Giant Wave-Drag Enhancement of Friction in Sliding Carbon Nanotubes
Paul Tangney, Marvin L. Cohen, Steven G. Louie
Molecular dynamics simulations of coaxial carbon nanotubes in relative sliding motion reveal a striking enhancement of friction when phonons whose group velocity is close to the sl…