Conductance of a Multiterminal Ballistic Wire.

An experimental study of the two-, three-, and four-terminal resistance of a ballistic wire is carried out. The wire is fabricated on the basis of high-mobility 2D electron gas in an AlGaAs/GaAs heterojunction. Different behavior of mesoscopic fluctuations of multiterminal resistances is observed depending on the gate voltage and magnetic field. At B = 0.45 T, the four-terminal resistance drops almost to zero and features resembling a ballistic conductance quantization are observed. © 2004 MAIK “Nauka / Interperiodica”. [ABSTRACT FROM AUTHOR]