title: Twist instability in strongly correlated carbon nanotubes.
abstract: We show that strong Luttinger correlations of the electron liquid in armchair carbon nanotubes significantly enhance the onset temperature of the putative twist Peierls instability and lead to its 1/R3 dependence on the tube radius. Depending on the values of the coupling constants the umklapp processes can either assist or compete with the twist instability. In the case of a competition the umklapp processes win in wide tubes. In narrow tubes the outcome of the competition depends on the relative strength of the e-e and e-ph backscattering. Our estimates show that the twist instability may be realized in freestanding (5,5) tubes.
authors.affiliation: Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA.
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: A V
authors.initials: AV
authors.lastname: Andreev
authors.forename: A M
authors.initials: AM
authors.lastname: Tsvelik
authors.forename: Dror
authors.initials: D
authors.lastname: Orgad