Landolt-Börnstein - Group III Condensed Matter

3.9 Statistical properties

Abstract

This chapter describes the observation of statistical properties of quantum point contacts. Experiments on QPC devices have indeed shown second-order coherence effects, but in fact the high degree of phase space occupation makes the observation of electron anti-bunching in the solid state. The first experiment to demonstrate anti-bunching in the solid state was based upon the interaction between two ballistic beams which are partially transmitted through a mesoscopic beam splitter. In this experiment, the QPCs are used to produce the two collimated beams of ballistic electrons with zero current noise. The channel resistance of a typical QPC device is plotted as a function of the applied gate voltage in the presence of a large parallel magnetic field. An alternative approach to investigate the fermionic correlations of electrons has been realized in transmission experiments through a QPC in the quantum Hall regime. A schematic illustration of the geometry employed to investigate the electron-nuclear spin interaction is illustrated.

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Title
3.9 Statistical properties
Book Title
Electronic Transport. Part 1: Quantum Point Contacts and Quantum Wires
In
3 Quantized transport
Book DOI
10.1007/b55682
Chapter DOI
10.1007/10479560_22
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
34B1
Editors
  • B. Kramer
  • Authors
  • D. Wharam
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