Barrier breakdown in a multiple quantum well structure

Details Barrier breakdown in a multiple quantum well structure Barrier breakdown in a multiple quantum well structure

2007-11-06

arxiv.org/abs/0711.0890v1

Physics

Condensed Matter

Materials Science

16 pages, 5 figures

Scientific paper

10.1063/1.2927472

We explore a regime of unipolar electronic transport in a multiple quantum well structure with very large current discontinuities - up to five orders of magnitude. Magneto-transport experiments reveal different transport regimes. Quantum well impact ionization shifts the structure from a resistive down state, where the current flows through inter-well quantum tunneling, to a highly conductive up state. In the latter regime, the current leaks through a barrier suddenly broken down because of an efficient ionization of the first quantum well.

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