Double-gap superconducting proximity effect in armchair carbon nanotubes
Karyn Le Hur, Smitha Vishveshwara, Cristina Bena
DOI 10.1103/PhysRevB.77.041406 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We theoretically explore the possibility of a superconducting proximity effect in single-walled metallic carbon nanotubes due to the presence of a superconducting substrate. An unconventional double-gap situation can arise in the two bands for nanotubes of large radius wherein the tunneling is (almost) symmetric in the two sublattices. In such a case, a proximity effect can take place in the symmetric band below a critical experimentally accessible Coulomb interaction strength in the nanotube. Furthermore, due to interactions in the nanotube, the appearance of a BCS gap in this band stabilizes superconductivity in the other band at lower temperatures. We also discuss the scenario of highly asymmetric tunneling and show that this case too supports double-gap superconductivity.
Similar papers
Double-gap superconducting proximity effect in nanotubes
similarity 0.94Karyn Le Hur et al. · 2007 · arXiv:0706.4256
Source status unknown — claims are unverified
Proximity effect in superconductor–carbon nanotube–superconductor tunnel junctions
similarity 0.90Jie Jiang et al.
Source status unknown — claims are unverified
Microscopic theory of the proximity effect in superconductor-graphene nanostructures
similarity 0.90P. Burset et al.
Source status unknown — claims are unverified
Exporting superconductivity across the gap: Proximity effect for semiconductor valence-band states due to contact with a simple-metal superconductor
similarity 0.88A. G. Moghaddam et al.
Source status unknown — claims are unverified
Superconducting proximity effect through a magnetic domain wall
similarity 0.88Alexander Konstandin et al.
Source status unknown — claims are unverified
Topological superconductivity in tripartite superconductor-ferromagnet-semiconductor nanowires
similarity 0.87Josias Langbehn et al.
Source status unknown — claims are unverified