Alteration of superconductivity and radial breathing modes in suspended ropes of carbon nanotubes by organic polymer coatings

Meydi Ferrier (1) , A.Yu. Kasumov (1) , Vincent Agache (2) , Lionel Buchaillot (2) , Anne-Marie Bonnot (3) , C. Naud (3) , Vincent Bouchiat (4) , Richard Deblock (1) , Mathieu Kociak (1) , Mathias Kobylko (1) , Sophie Guéron (1) , Helene Bouchiat (1)

1 LPS - Laboratoire de Physique des Solides
2 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
3 LEPES - Laboratoire d'Etudes des Propriétés Electroniques des Solides
4 CRTBT - Centre de Recherches sur les Très Basses Températures

We have altered the superconductivity of a suspended rope of single walled carbon nanotubes, by coating it with organic polymers. Upon coating, the normal state resistance of the rope changes by less than 20%. But superconductivity, which on the bare rope shows up as a substantial resistance decrease below 300 mK, is gradually suppressed. We correlate this to the suppression of radial breathing modes, measured with raman spectroscopy on suspended single and double-walled carbon nanotubes. This points to the breathing phonon modes as being responsible for superconductivity in ropes of single walled carbon nanotubes.

Domaines: Sciences de l'ingénieur [physics]

Meydi Ferrier, A.Yu. Kasumov, Vincent Agache, Lionel Buchaillot, Anne-Marie Bonnot, et al.. Alteration of superconductivity and radial breathing modes in suspended ropes of carbon nanotubes by organic polymer coatings. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 74, pp.241402. ⟨10.1103/PhysRevB.74.241402⟩. ⟨hal-00128661⟩