Mobility of Electrons: Why are They More Mobile than Holes?

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    Electrons Mobility
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Discussion Overview

The discussion centers on the mobility of electrons compared to holes in semiconductor materials, specifically addressing the factors that contribute to their differing mobilities. The conversation touches on concepts related to effective mass and the conditions under which these properties are observed.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant questions why electrons exhibit greater mobility than holes despite having a larger effective mass.
  • Another participant clarifies that in materials like silicon (Si) and gallium arsenide (GaAs), the transport effective mass of electrons is actually smaller than that of holes.
  • A participant specifies that they are referring to the density of states (DOS) effective mass.
  • One participant raises a question about the movement of electrons in relation to the movement of holes, suggesting that electron movement is necessary for hole movement to occur.
  • Another participant notes the age of previous posts in the thread, indicating a potential lack of recent engagement on the topic.

Areas of Agreement / Disagreement

Participants express differing views on the effective mass of electrons and holes, with no consensus reached on the reasons for the differences in mobility.

Contextual Notes

The discussion involves assumptions about effective mass definitions and the conditions under which these properties apply, which may not be fully articulated by participants.

sudeshiitr
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why the mobility of electrons more than holes despite the fact that electrons have larger effective mass than holes.
 
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What system are you talking about? In Si and GaAs, the (transport) effective mass of electrons is smaller than that of holes.

Note: In general, the transport effective mass will differ from the DOS effective mass, particularly if the valley degeneracy is not 1 or if there is a large anisotropy in the structure.
 
I am talking about DOS effective mass...
 
did anyone ever answer this question about the http://www.3gcgroup.com/" of the electrons?
 
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Don't the electrons have to move in order for holes to move? How else do you get holes?
 
johnsims said:
did anyone ever answer this question about the http://www.3gcgroup.com/" of the electrons?
Please pay attention to the dates of the posts, your last post was in a 6 year old thread, this one is 4 years old.
 
Last edited by a moderator:

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