Is Ohm's Law Applicable to Semiconductors in a Magnetic Field?

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SUMMARY

Ohm's Law is not applicable to semiconductors in a magnetic field, as confirmed by the discussion. Semiconductors exhibit non-linear V-I characteristics, which invalidate the use of Ohm's Law under typical conditions. However, within specific ranges where resistive heating is negligible and carrier density remains stable, semiconductors may display Ohmic-like behavior. Therefore, while Ohm's Law can be observed in limited scenarios, it is fundamentally inappropriate for general semiconductor analysis.

PREREQUISITES
  • Understanding of semiconductor physics
  • Familiarity with V-I (Voltage-Current) characteristics
  • Knowledge of resistive heating effects
  • Basic principles of magnetic fields in electrical contexts
NEXT STEPS
  • Explore the V-I characteristics of various semiconductor materials
  • Study the effects of magnetic fields on semiconductor behavior
  • Investigate the concept of resistive heating in semiconductors
  • Learn about the limitations of Ohm's Law in non-linear systems
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Electrical engineers, physicists, and students studying semiconductor technology and its applications in magnetic fields.

MementoMori96
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Is correct to calculate the resistance of a semiconductor sample in a magnetic field with ohm’s law?
 
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Ohm's Law is for conductors. Semiconductors do not follow Ohm's Law, which is evident from their V-I graph. So Ohm's law cannot be applied to semiconductors under any circumstance.
 
Wrichik Basu said:
Ohm's Law is for conductors. Semiconductors do not follow Ohm's Law, which is evident from their V-I graph. So Ohm's law cannot be applied to semiconductors under any circumstance.

Outside of the gap voltage, IV (or VI) curves of a typical semiconductor still have Ohmic-like behavior over some range. Of course, this is still governed by a range where resistive heating doesn't come into play and in regions where the carrier density does not change considerably.

MementoMori96 said:
Is correct to calculate the resistance of a semiconductor sample in a magnetic field with ohm’s law?

Why don't you plot out the IV values? If it is a straight line, then within that range, Ohm's law is valid. If it isn't, then you've gone beyond the validity range.

Zz.
 
Last edited:

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