Superconductivity in armchair carbon nanotubes

2019-12-12 14:19:41

single nanotubes superconducting phonons fluctuations

责任者: Sedeki, A.;Caron, L.G.;Bourbonnais, C. 单位: Dept. de Phys., Sherbrooke Univ., Que., Canada 来源出处: Physical Review B (Condensed Matter and Materials Physics)(Phys. Rev, B, Condens, Matter Mater. Phys. (USA)),2002/04/01,65(14):140515-1 摘要: We use the momentum space renormalization group to study the influence of phonons and the Coulomb interaction on the superconducting response function of armchair single-walled nanotubes. We do not find superconductivity in undoped single nanotubes. When doped, superconducting fluctuations can develop because of the phonons but remain small and are easily destroyed by the Coulomb interaction. The origin of superconductivity in ropes of nanotubes is most likely an intertube effect. Projections to zigzag nanotubes indicate a more favorable disposition to superconducting fluctuations 关键词: carbon nanotubes;fluctuations in superconductors;phonons;renormalisation;type II superconductors;superconductivity;armchair carbon nanotubes;momentum space renormalization group;phonons;Coulomb interaction;superconducting response function;armchair single-walled nanotubes;undoped single nanotubes;superconducting fluctuations;ropes;intertube effect;zigzag nanotubes;C