Parallel in-plane-gated wires coupled by a ballistic window

Y. Hirayama, A. D. Wieck, T. Bever, K. Von Klitzing, K. Ploog

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26 Citations (Scopus)


Two parallel in-plane-gated (IPG) wires are coupled by a ballistic window. The ballistic window is rectangular, and the four terminals have a different arrangement from the usual fourfold-symmetry structures (such as a wire cross) where alternate terminals face each other. The ballistic coupling is achieved between two parallel wires by a sideways component but not by a straightforward component, and the four-terminal resistance (or transfer resistance) becomes negative at zero magnetic field. The amount of a sideways ballistic component is sensitive to a subband depopulation in each wire. The modulation of a sideways ballistic component results in a distinct oscillation in the four-terminal resistance as a function of the IPG voltage. The magneto-depopulation of one-dimensional subbands in each wire is also clearly observed in this system.

Original languageEnglish
Pages (from-to)4035-4040
Number of pages6
JournalPhysical Review B
Issue number7
Publication statusPublished - 1992


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