Physics – Condensed Matter – Superconductivity
Scientific paper
2000-03-16
in "Electronic Properties of Novel Materials - Molecular Nanostructures", (American Institute of Physics, 2000), pp. 334-347
Physics
Condensed Matter
Superconductivity
proceedings paper of the 14th International Winterschool on Electronic Properties of Novel Materials Molecular Nanostructures
Scientific paper
10.1063/1.1342528
Effects of the superconducting pair potential on the impurity scattering processes in metallic carbon nanotubes are studied theoretically. The backward scattering of electrons vanishes in the normal state. In the presence of the superconducting pair correlations, the backward scatterings of electron- and hole-like quasiparticles vanish, too. The impurity gives rise to backward scatterings of holes for incident electrons, and it also induces backward scatterings of electrons for incident holes. Negative and positive currents induced by such the scatterings between electrons and holes cancel each other. Therefore, the nonmagnetic impurity does not hinder the supercurrent in the regions where the superconducting proximity effects occur, and the carbon nanotube is a good conductor for Cooper pairs. Relations with experiments are discussed.
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