ONE-DIMENSIONAL QUANTUM-WIRE STATES PROBED BY RESONANT ELECTRON-TUNNELING

We have resolved the bound states of a one-dimensional quantum wire by resonant electron tunneling. The atomically precise quantum-confined structure was prepared by cleaved-edge overgrowth in GaAs/AlxGa1-xAs m olecular-beam epitaxy. Tunneling proceeded, in a planar geometry, from the edge of a two-dimensional electron source through the bound state s of the quantum wire into the edge of a two-dimensional electron drai n. The experimental resonance positions, as well as their density depe ndences, are well reproduced by our self-consistent theoretical calcul ations.