Talk:Semimetal
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[edit] Definition
The definition for semimetal was taken from Burns, Gerald (1985). Solid State Physics, 339-40, Academic Press, Inc. ISBN 0-12-146070-3. Previously, this page had redirected to metalloid, and I don't believe the two are synonomous. eaolson 00:26, 14 June 2006 (UTC)
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- I agree eaolson. They are not. As I learned the definition of semimetal (I'm Solid State Chemist)a semimetal is a semiconductor with a negative indirect bandgap and the standard example was tin (usually not considered a metalloid). Metalloids are elements on the diagonal in the periodic table that can very well be semiconductors with a positive bandgap (direct or indirect).
Semimetals are not necessarily elements and although they behave a lot like metals they differ from them because they have conduction from both holes and electrons (in different parts of the Brilouin zone). Metals typically have one kind of carriers. 152.1.193.141 19:10, 6 August 2006 (UTC) nl:Gebruiker:Sokpopje
or better
nl.wiktionary Gebruiker:Jcwf
I made a little schematic diagram of a direct semiconductor (A), indirect semiconductor (B) and a semimetal (C) that may be of use. It's a bit primitive but the best I can do.
Jcwf
- Could you please save this as a PNG or GIF instead of a JPEG? Don't simply convert it from JPEG, but export the original drawing as a PNG without going through JPEG compression at all. —Keenan Pepper 20:38, 6 August 2006 (UTC)
- OK I'll try, but I am not good at these things sorry
- Thanks. See how the hazy ripples are gone? Also the PNG is about half the size of the JPEG. I added it to the article but you might want to improve the caption. —Keenan Pepper 23:59, 6 August 2006 (UTC)
What has a negative direct bandgap? -lysdexia 02:30, 3 October 2006 (UTC)
- Gallium(III) arsenide for example, I would think. I've never really heard anyone use the term "negative bandgap," though. eaolson 02:33, 3 October 2006 (UTC)
