Landolt-Börnstein - Group III Condensed Matter

7.9 Non-linear effects

Abstract

This chapter provides literature on non-linear effects. The current-voltage (I-V) characteristic of a small disordered conductor is in general neither linear nor does it exhibit inversion symmetry as a classical conductor does. The transmission coefficient of a random potential does not rise monotonically with the applied voltage bias and thus the current is not a monotonic function of the source-drain voltage. In the localized regime, the current may depend exponentially on the driving voltage. In conductors with a non-linear current-voltage characteristics, increasing the voltage bias may decrease the current, leading to a negative differential conductance. Further, when an ac bias is applied, higher harmonics are generated. Finally, in the case of an asymmetric I-V characteristic, rectification takes place. Typical I-V characteristics at room temperature are shown.

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Title
7.9 Non-linear effects
Book Title
Electronic Transport. Part 1: Quantum Point Contacts and Quantum Wires
In
7 Single wires
Book DOI
10.1007/b55682
Chapter DOI
10.1007/10479560_46
Part of
Landolt-Börnstein - Group III Condensed Matter
Volume
34B1
Editors
  • B. Kramer
  • Authors
  • A. Fechner
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