|Version 9 (modified by ngel1914, 8 years ago) (diff)|
At a Glance
Simulate E-k and DOS of CNTs and carbon nanoribbons.
Carbon-Nano Bands is a suite of FORTRAN and MATLAB/OCTAVE scripts that plot the E-k relationship, density-of-states, and molecular structure for carbon nanotubes and carbon nanoribbons.
Carbon Nanotubes For simulations of carbon nanotubes, users may select between the Pz Orbital model, which treats the nanotube as a rolled up graphene sheet whose band structure is computed by a simple tight binding approach and assumes a single pi orbital per carbon atom, or the more rigorous Huckel Theory Model, which treats the nanotube as a unique structure and uses four orbitals per carbon atom. Users indicate the carbon nanotube to be simulated by indicating the chirality vector (n,m), which uses the basis vectors for graphene. When using the Pz Orbital model, users may also indicate the tight binding energy and carbon-carbon spacing of the nanotube. In addition to plots of E-k, DOS, and molecular structure, the simulator also extracts some useful parameters from the input values and output plots, and displays these in an output log. Such outputs include diameter, number of hexagons per unit cell, and bandgap. Carbon Nanoribbons For simulations of carbon nanoribbons, only the Pz Orbital model is available. Users indicate the carbon nanoribbon to be simulated by indicating the chirality vector (n,m), which uses basis vectors that have magnitude equal to half those of graphene, and the relative origin of this vector, A or B. Users may only select carbon nanoribbons from the subset that can be described by setting this type of chirality vector, which is constrained in both magnitude and origin. In addition to plots of E-k, DOS, and molecular structure, the simulator also extracts the bandgap of the nanoribbon and writes it to the output log.
Credits Youngki Yoon, Diego Kienle, James Fodor, Jing Guo
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