title: Spin-polarized conductance induced by tunneling through a magnetic impurity.
abstract: Using the zero mode method, we compute the conductance of a wire consisting of a magnetic impurity coupled to two Luttinger liquid leads characterized by the Luttinger exponent alpha(>or=1). We find for resonance conditions, in which the Fermi energy of the leads is close to a single particle energy of the impurity, that the conductance as a function of temperature is G approximately equal (e(2)/h)(T/T(F))(2(alpha-2)), whereas for off-resonance conditions the conductance is G approximately equal (e(2)/h)(T/T(F))(2(alpha-1)). By applying either a gate voltage or a magnetic field or both, one of the spin components can be in resonance while the other is off resonance causing a strong asymmetry between the spin-up and spin-down conductances.
authors.affiliation: Department of Physics, City College of the City University of New York, New York, New York 10031, USA.
authors.forename: D
authors.initials: D
authors.lastname: Schmeltzer
authors.forename: A R
authors.initials: AR
authors.lastname: Bishop
authors.forename: A
authors.initials: A
authors.lastname: Saxena
authors.forename: D L
authors.initials: DL
authors.lastname: Smith