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Physical Review B
Paper

Quantized transmission of a saddle-point constriction

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Abstract

Conductance quantization in the absence and in the presence of a magnetic field is discussed for a split-gate constriction with a local potential at the bottleneck forming a saddle. Simple criteria for the occurrence of conductance steps and the accuracy of quantization are given in terms of the curvatures of the saddle. © 1990 The American Physical Society.

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Publication

Physical Review B

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