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VOLUME 57 (1993) | ISSUE 6 | PAGE 346
Short-range impurity in a noncentral cross section of a saddle-point microconstriction
The conductance of the saddle-point potential with a short-range impurity in a noncentral cross section of the channel has been calculated for an arbitrary number of transverse modes. A series of downward dips in the conductance versus the Fermi energy has been observed below each threshold. The crossover from resonant dip to a peak near the threshold has also been observed.