Electron-phonon coupling and superconductivity in double-walled carbon nanotubes
Jesse Noffsinger, Marvin L. Cohen
DOI 10.1103/PhysRevB.83.165420 · Physical Review B
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Abstract
Using first-principles techniques we study the electronic structure, deformation potentials, and electron-phonon coupling in both single-walled and double-walled carbon nanotubes. Calculations were done for metallic single-walled carbon nanotubes in armchair configurations (5,5) and (10,10). Additionally, we study the effect of concentric multiwalled systems by performing calculations on the double-walled tube (5,5)@(10,10). By comparing the properties of the (5,5) and (10,10) tubes both in isolated and in concentric form arrangements, we are able to investigate the effect on electron-phonon coupling of the double-walled and, consequently, multiwalled carbon nanotube arrangement. No significant increase in total electron-phonon coupling is found in the double-walled tube compared to the single-walled carbon nanotubes within the calculations of the isolated tubes under consideration.
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