title: Tunneling into a Luttinger liquid revisited.
abstract: We study how electron-electron interactions renormalize tunneling into a Luttinger liquid beyond the lowest order of perturbation in the tunneling amplitude. We find that the conventional fixed point has a finite basin of attraction only in the point contact model, but a finite size of the contact makes it generically unstable to the tunneling-induced breakup of the liquid into two independent parts. In the course of renormalization to the nonperturbative-in-tunneling fixed point, the tunneling conductance may show a nonmonotonic behavior with temperature or bias voltage.
authors.affiliation: Petersburg Nuclear Physics Institute, St. Petersburg, Russia.
authors.forename: D N
authors.initials: DN
authors.lastname: Aristov
authors.forename: A P
authors.initials: AP
authors.lastname: Dmitriev
authors.forename: I V
authors.initials: IV
authors.lastname: Gornyi
authors.forename: V Yu
authors.initials: VY
authors.lastname: Kachorovskii
authors.forename: D G
authors.initials: DG
authors.lastname: Polyakov
authors.forename: P
authors.initials: P
authors.lastname: Wölfle