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The field emission performance of different compositions of multi-wall carbon nanotubes (MWCN) are studied theoretically based on the quantum tunneling theory with the tight-binding approach. We found that the key characteristics of all MWCNs are almost independent of the composition and the layer number of MWCN for MWCNs with the layer number being more than three. The interlayer coupling of MWCN...
Using the quantum tunneling theory with the tight-binding approach, we study the effects of Peierls distortion and the magnetic field in the field emission of carbon nanotubes. The Peierls distortion opens an energy gap at Fermi level, which suppresses the emission current. The responses of the emission current to the magnetic field are quite different for the semiconducting and metallic tubes
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