Timeline for Holes in a P-type semiconductor under external force E
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Nov 12, 2013 at 18:46 | comment | added | akhmeteli | @Lorniper: I agree and understand that, but I used the quote just to emphasize that you may need to take into account all electrons in the valence band, not just those at the top of the band. | |
| Nov 12, 2013 at 13:58 | comment | added | Lorniper | "A perfectly-full band always has zero current " indicate a non-doped bulk material at equilibrium, clearly no net current. I am asking holes transport in a P-type semiconductors under external force E! | |
| Nov 12, 2013 at 12:04 | comment | added | akhmeteli | @Lorniper: This does not seem to affect what I said, because what I said is about ALL electrons in the valence band, not just those at the band maximum: "A perfectly-full band always has zero current. One way to think about this fact is that the electron states near the top of the band have negative effective mass, and those near the bottom of the band have positive effective mass, so the net motion is exactly zero." (en.wikipedia.org/wiki/Electron_hole) So, if a hole moves in the "wrong" direction, the electrons still move in the opposite direction. | |
| Nov 11, 2013 at 21:35 | comment | added | Lorniper | basically I agree with this answer physics.stackexchange.com/questions/10800/…, though did not ask my question | |
| Nov 11, 2013 at 12:48 | comment | added | akhmeteli | @Lorniper: I don't quite see why they move in the same direction. Could you give a reference? | |
| Nov 11, 2013 at 10:55 | comment | added | Lorniper | well, there is something illusive here.. Do you agree, under a certain external force(say,E), the electron and holes in the valence band are moving in the same directions since electrons have negative effective mass and holes have positive one?(clearly this is true at valence band maximum) | |
| Nov 11, 2013 at 7:36 | comment | added | akhmeteli | @Lorniper: I did not say the electrons move "together with holes", I said they "move to holes", therefore, in the direction opposite to that of hole motion: if an electron in point A moved to a hole in point B, this is equivalent to movement of the hole from point B to Point A, i.e., in the opposite direction. | |
| Nov 11, 2013 at 7:27 | comment | added | Lorniper | if these valence electrons move together with holes, since they have negative effective masses, they should response to the external force(E) to the opposite direction, i.e. move towards cathod, this is wierd, because they cancel the hole current... | |
| Nov 10, 2013 at 18:24 | history | answered | akhmeteli | CC BY-SA 3.0 |