Semiconductor has electron and hole, why not conductor has hole?

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SUMMARY

The discussion clarifies the distinction between intrinsic semiconductors and conductors regarding electron and hole conduction. In intrinsic semiconductors, conductivity is calculated using the formula σ = 2neμ, where n represents the number of electrons, e is the electron charge, and μ is electron mobility. In contrast, conductors have their electrons already in the conduction band, leading to the formula σ = neμ. Some conductors, such as tin, exhibit hole conduction and are classified as semimetals, including elements like arsenic, antimony, and bismuth.

PREREQUISITES
  • Understanding of intrinsic semiconductor conductivity formulas
  • Knowledge of electron mobility and its impact on conductivity
  • Familiarity with the concept of the conduction band
  • Awareness of semimetals and their properties
NEXT STEPS
  • Research the properties of semimetals, focusing on tin and its conduction mechanisms
  • Explore the differences between intrinsic and extrinsic semiconductors
  • Learn about the role of the Fermi level in conductors and semiconductors
  • Investigate the applications of semimetals in electronic devices
USEFUL FOR

Electrical engineers, materials scientists, and students studying semiconductor physics will benefit from this discussion, particularly those interested in the mechanisms of electrical conduction in different materials.

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For intrinsic semiconductor, the know its conductivity=2 neμ , where his the number of electron per cubic meter, e is the charge of an electron, μ is the electron mobility.
But if I want to calculate the conductivity of a conductor= neμ.
Why not consider the hole in? Electron leaves its original place to conduction band will leave a hole behind, this is not true in conductor?

Thank you.
 
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The electrons in conductors responsible for electrical conduction are already in the conduction band even at 0K (ie the Fermi level is in the conduction band). That's why we call them "conductors" to begin with.
 
Thank you^^
 
Some do

Some conductors, like tin, do support hole conduction. They are termed semimetals. The classic semimetallic elements are arsenic, antimony, bismuth, α-tin (gray tin) and graphite, an allotrope of carbon. http://en.wikipedia.org/wiki/Semimetal
 
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