Coulomb blockade in a quantum wire with long-range interactions
Laboratoire de Physique des Solides, Université
Paris-Sud, Bât. 510, 91405 Orsay, France
Accepted: 20 May 1997
We study the transport through two impurities in a one-dimensional quantum wire, taking account of long-range Coulomb interactions. We compute the temperature-dependent conductance G(T). Long-range forces lead to a dramatic increase of weak barrier potentials with decreasing temperature, even on “resonance”. The system thus always reaches a “strong barrier” regime in which only the charge is pinned, contrary to the standard Luttinger liquid. G(T) vanishes faster than any power as T goes to zero. In particular, resonant tunneling is suppressed at zero temperature.
PACS: 71.10.Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) / 73.61.-r – Electrical properties of specific thin films and layer structures (multilayers, superlattices, quantum wells, wires, and dots)
© EDP Sciences, 1997