Curvature effects on magnetoelectronic properties of nanographene ribbons

Chiun Yan Lin, Szu Chao Chen, Jhao Ying Wu, Ming Fa Lin

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Magnetoelectronic properties of curved nanographene ribbons are investigated through the Peierls tight-binding model. Those properties are strongly affected by an effectively non-uniform magnetic field and the finite-size effect. The curvature converts quasi-Landau levels into oscillating parabolic energy bands with several band-edge states. Such extra states induce asymmetric prominent peaks in the density of states. The number, height, spacing and frequency of those peaks depend strongly on the field strength and the central angle. Moreover, the spatial symmetry of the Landau wave function is broken. The simple proportionality relationship between the wave function on the two sublattices A and B disappears, which implies that the essential physical properties might be drastically changed. Nanographene ribbons are very different from carbon nanotubes in electronic properties, mainly owing to the boundary conditions.

Original languageEnglish
Article number064719
JournalJournal of the Physical Society of Japan
Volume81
Issue number6
DOIs
Publication statusPublished - 2012 Jun

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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