Comparison between metals and semiconductors

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Discussion Overview

The discussion centers on the comparison between metals (conductors) and semiconductors, specifically addressing the limitations of classical theories in explaining semiconductor behavior. Participants explore various electrical properties of semiconductors beyond temperature-dependent resistivity.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant requests a comparison between conductors and semiconductors, emphasizing the inadequacy of classical understanding for semiconductors.
  • Another participant suggests reviewing classical conduction and resistance theories and mentions "band theory of solids" as a classification method for conductors and semiconductors.
  • A participant expresses a restriction against using band structures in their assignment, indicating a need for alternative explanations.
  • There is a challenge regarding the initial post's lack of clarity about assignment constraints, with a suggestion that the topic may belong in a different forum.
  • Another participant advises that while band theory cannot be used directly, historical context leading to band theory could be beneficial for understanding semiconductor properties.
  • Participants note the necessity of outlining classical conduction theories and identifying semiconductor properties that do not align with classical expectations.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best approach to the assignment, as there are differing views on the use of band theory and the constraints of the assignment itself.

Contextual Notes

Participants highlight limitations regarding the use of band structures and the need for a clear understanding of classical theories of conduction. There is an indication that the assignment may have specific constraints that affect the discussion.

002088iverson
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Hey guys I've got an assignment. I need a comparison between a normal conductor and a semiconductor and why a classical understanding isn't enough to explain how an SC works. Also are there any electrical properties of an SC besides decreasing resisitivity at higher temps?
 
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Welcome to PF;
Review the classical treatment of how conduction and resistance happens.
Look up "band theory of solids" for how conductors, semi-conductors, and resistors get classified.

Semi-conductor behavior can get very complicated.
There are lots of properties besides the temperature dependence of resistivity.
 
im not allowed to use band structures :/
 
002088iverson said:
im not allowed to use band structures :/

Yet, you neglected to state this in your original post. Care to list out any further constraints to this assignment before one of us wastes our time and effort giving you a response that you can't use?

BTW, is this a school-related work that should have been done in the HW/Coursework forum instead?

Zz.
 
I apologise, this is the first time I've used a forum. I just saw solid state physics so I thought it'd go in there
 
band-theory as a search term will get you the information you need even though you cannot use the band theory itself. You will want some sort of historical overview leading up to band theory - that should actually tell you why band theory is needed.

You still need to spell out the classical theory of conduction and look for properties of semi-conduction that do not fit.
 

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