Symmetry based properties of the transition metal dichalcogenide nanotubes
Faculty of Physics, University of Belgrade, PO Box 368, 11001 Belgrade, Yugoslavia
Published online: 15 October 2000
The full geometrical symmetry groups (the line groups) of the monolayered, 2Hb and 3R polytypes of the inorganic MoS2 and WS2 micro- and nanotubes of arbitrary chirality are found. This is used to find the coordinates of the representative atoms sufficient to determine completely the geometrical structure of the tubes. Then some physical properties which can be deduced from the symmetry are discussed: electron band degeneracies, selection rules, general forms of the second rank tensors and potentials, phonon spectra.
PACS: 61.46.+w – Clusters, nanoparticles, and nanocrystalline materials / 78.66.-w – Optical properties of specific thin films, surfaces, and low-dimensional structures / 63.22.+m – Phonons in low-dimensional structures and small particles
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000