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Tunneling through rectangular quantum dots at high magnetic fields

Physical Review B, ISSN: 0163-1829, Vol: 50, Issue: 7, Page: 4658-4663
1994
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  • Citations
    19
    • Citation Indexes
      19

Article Description

Transport in a quasi-one-dimensional wire containing a rectangular quantum dot in a strong magnetic field is studied numerically. As the width of the wire is varied, a rectangular dot on the wire introduces peak or dip structures in the conductance. The charge-density distribution and current-flow pattern clearly show that the Landau-level coupling between the zero-dimensional (0D) state and the extended state is the origin of these structures. At the resonant points, which correspond to-0D states in the dot, Landau level coupling becomes essential and the propagation of one Landau level is enhanced or blocked by the 0D state of a different Landau level. © 1994 The American Physical Society.

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