Connetable, D
Rignanese, Gian-Marco
[UCL/FSA/MAPR/PCPM]
Charlier, Jean-Christophe
[UCL]
Blase, X
By means of ab initio simulations, we investigate the phonon band structure and electron-phonon coupling in small 4-Angstrom diameter nanotubes. We show that both the C(5,0) and C(3,3) tubes undergo above room temperature a Peierls transition mediated by an acoustical long wavelength and an optical q=2k(F) phonon, respectively. In the armchair geometry, we verify that the electron-phonon coupling parameter lambda originates mainly from phonons at q=2k(F) and is strongly enhanced when the diameter decreases. These results question the origin of superconductivity in small diameter nanotubes.
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Bibliographic reference |
Connetable, D ; Rignanese, Gian-Marco ; Charlier, Jean-Christophe ; Blase, X. Room temperature Peierls distortion in small diameter nanotubes. In: Physical Review Letters, Vol. 94, no. 1 (2005) |
Permanent URL |
http://hdl.handle.net/2078.1/39602 |