title: Finite-size effects in tunneling between parallel quantum wires.
abstract: We present theoretical calculations and experimental measurements which reveal finite-size effects in the tunneling between two parallel quantum wires, fabricated at the cleaved edge of a GaAs/AlGaAs bilayer heterostructure. Observed oscillations in the differential conductance, as a function of bias voltage and applied magnetic field, provide direct information on the shape of the confining potential. Superimposed modulations indicate the existence of two distinct excitation velocities, as expected from spin-charge separation.
authors.affiliation: Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors.forename: Yaroslav
authors.initials: Y
authors.lastname: Tserkovnyak
authors.forename: Bertrand I
authors.initials: BI
authors.lastname: Halperin
authors.forename: Ophir M
authors.initials: OM
authors.lastname: Auslaender
authors.forename: Amir
authors.initials: A
authors.lastname: Yacoby