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Does a semiconductor follow Ohm's law?

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1

$begingroup$

Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?

I am not talking about a PN junction here.

If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?

semiconductors ohms-law

share|improve this question

edited 57 mins ago

Hearth

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asked 1 hour ago

Shaona BoseShaona Bose

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New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
  $endgroup$
  – jonk
  1 hour ago
  

  
  
  
  

add a comment | 

1

$begingroup$

Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?

I am not talking about a PN junction here.

If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?

semiconductors ohms-law

share|improve this question

edited 57 mins ago

Hearth

5,27011340

asked 1 hour ago

Shaona BoseShaona Bose

1063

New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

• 
  
  
  

  
  

  
  
  
  
  
  

  
  $begingroup$
  Yes. In fact, the very first chapter of any book on microelectronics starts out at the beginning analyzing semiconductor behavior with the assumption of the Drude model and the application of Ohm's Law (though you'd have to put some of the equations together to produce Ohm's law, since they will be using volts/meter, usually.)
  $endgroup$
  – jonk
  1 hour ago
  

  
  
  
  

add a comment | 

$begingroup$

Ohm's law is valid for metals, but is it valid for semiconductors? Does it work there?

I am not talking about a PN junction here.

If I have a block of silicon and pass voltage across it, will I see current flowing, in accordance with Ohm's law?

semiconductors ohms-law

share|improve this question

edited 57 mins ago

Hearth

5,27011340

asked 1 hour ago

Shaona BoseShaona Bose

1063

New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

$endgroup$

share|improve this question

edited 57 mins ago

Hearth

5,27011340

asked 1 hour ago

Shaona BoseShaona Bose

1063

New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 57 mins ago

Hearth

5,27011340

asked 1 hour ago

Shaona BoseShaona Bose

1063

New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 57 mins ago

Hearth

5,27011340

edited 57 mins ago

Hearth

5,27011340

asked 1 hour ago

Shaona BoseShaona Bose

1063

New contributor

Shaona Bose is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 1 hour ago

Shaona BoseShaona Bose

1063

1 Answer
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$begingroup$

Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.

Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.

Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.

For further information on where it gets murky, see this question.

share|improve this answer

edited 1 hour ago

answered 1 hour ago

HearthHearth

5,27011340

$endgroup$

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4

$begingroup$

Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.

Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.

Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.

For further information on where it gets murky, see this question.

share|improve this answer

edited 1 hour ago

answered 1 hour ago

HearthHearth

5,27011340

$endgroup$

add a comment | 

4

$begingroup$

Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.

Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.

Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.

For further information on where it gets murky, see this question.

share|improve this answer

edited 1 hour ago

answered 1 hour ago

HearthHearth

5,27011340

$endgroup$

add a comment | 

$begingroup$

Yes. All materials under normal conditions follow ohm's law, though it becomes less useful in good insulators where breakdown occurs before any substantial amount of current can flow.

Non-ohmic effects occur at boundaries between different materials, such as pn junctions, schottky junctions, thermocouples, electrochemical cells, et cetera. They can also be observed in discharge phenomena, where the flow of current causes ionization and chemical changes in the conducting material.

Edit: it's worth mentioning that the presence of (changing) magnetic fields can complicate things. Transformers and inductors are not generally considered to obey ohm's law under dynamic conditions, for instance.

For further information on where it gets murky, see this question.

share|improve this answer

edited 1 hour ago

answered 1 hour ago

HearthHearth

5,27011340

$endgroup$

share|improve this answer

edited 1 hour ago

answered 1 hour ago

HearthHearth

5,27011340

answered 1 hour ago

HearthHearth

5,27011340

answered 1 hour ago

HearthHearth

5,27011340