Zener Tunneling Phenomena: Local or Non-Local Carriers?

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SUMMARY

Zener tunneling phenomena involve the tunneling of electrons from the conduction band of the n-type region into the valence band of the p-type region, particularly in tunnel diodes under small bias conditions. The process is characterized by the non-local generation of carriers, as the Fermi energy in a tunnel diode does not reside within the band-gap. This understanding is crucial for analyzing the behavior of carriers during tunneling events. The discussion clarifies that the generation of holes and electrons is a direct consequence of this tunneling mechanism.

PREREQUISITES
  • Understanding of Zener tunneling and its implications in semiconductor physics
  • Familiarity with tunnel diodes and their operational principles
  • Knowledge of conduction and valence bands in semiconductor materials
  • Basic concepts of Fermi energy and band-gap theory
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  • Research the operational principles of tunnel diodes under varying bias conditions
  • Explore the mathematical modeling of Zener tunneling phenomena
  • Study the implications of Fermi energy positioning in semiconductor devices
  • Investigate the role of carrier generation in different semiconductor materials
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Physicists, electrical engineers, and semiconductor researchers interested in the mechanisms of carrier generation and tunneling effects in semiconductor devices.

veejay
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in zener tunneling phenomena, are the carriers locally generated or non-locally generated?
i.e, should we assume the process as though it were generation of holes in the valence band and electrons in the conduction band?
i hope someone could shed some physics on this concept.
thanks.
 
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Actually, it's almost the other way round. Look at a tunnel-diode at small bias: The electrons from the conduction band of the n-type region tunnel across the junction, into the empty states in the valence band of the p-type region (remember, in a tunnel-diode, the Fermi energy does not lie within the band-gap).
 

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