title: Spin transport in interacting quantum wires and carbon nanotubes
abstract: We present a general formulation of spin-dependent transport through a clean one-dimensional interacting quantum wire or carbon nanotube, connected to noncollinear ferromagnets via tunnel junctions. The low energy description of each junction is given by a conformally invariant boundary condition representing exchange coupling, in addition to a pair of electron tunneling operators. The effects of the exchange coupling are strongly enhanced by interactions, leading to a dramatic suppression of spin accumulation: a direct signature of spin-charge separation. Finally, backscattering induces nonequilibrium oscillations in the current-voltage relation.
authors.affiliation: Physics Department, University of California, Santa Barbara, California 93106, USA.
authors.initials: L
authors.lastname: Balents
authors.initials: R
authors.lastname: Egger