2005/04/26 by S. Y. Zhou, Shuyun Zhou, G.-H. Gweon +9 · 1 citation
Materials Science · Physics and Astronomy · #Graphene research and applications #Semiconductor materials and interfaces #Surface and Thin Film Phenomena #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.71.161403
published as Phys. Rev. B 71, 161403(R) (2005) · 4 pages, 3 figures
openalex publication_date 2005/04/26 · arxiv created 2005/06/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Angle resolved photoelectron spectroscopy (ARPES) on azimuthally disordered graphite demonstrates that sharp quasiparticle dispersions along the radial direction can coexist with a complete lack of dispersion along the azimuthal direction. This paradoxical coexistence can be explained in terms of van Hove singularities in the angular density of states. In addition, nondispersive features at the energies of band maxima and saddle points are observed and possible explanations are discussed. This work opens a possibility of studying the electronic structure of layered materials using ARPES even when large single crystals are difficult to obtain.