Work

Double-gap superconducting proximity effect in armchair carbon nanotubes

Year: 2008

Type: article

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.

Source: Physical Review B

DOI: 10.1103/physrevb.77.041406

Authors: Karyn Le Hur, Smitha Vishveshwara, Cristina Bena

Institutions: Yale University, University of Illinois Urbana-Champaign, Commissariat à l'Énergie Atomique et aux Énergies Alternatives, CEA Paris-Saclay

Language: English

Topic: Physics of Superconductivity and Magnetism

Subfield: Condensed Matter Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1508580375

FWCI: 0.524

Cites: 35

Cited by: 15

Related to: 10