[SI-LIST] Re: Effect of Temperature on Metal Conductivity
- From: "Daniel Chow" <DCHOW@xxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>
- Date: Tue, 23 Nov 2004 09:04:15 -0800
Hi Joseph,
Be careful not to confuse superconductivity with temperature dependence
of resistivity!
Resistivity is due to electron-electron collisions, which are
temperature dependent.
Superconductivity is a effectively a change of physical phase in the
material. This phase change can be brought about by several ways, one
of which is temperature. The superconducting phase has many properties,
one of which is the discontinuous vanishing of electrical resistance.
My point is that these are two separate phenomena, but can easily be
confused together.
Thanks!
=20
Daniel Chow, Ph.D.
Sr. Product Engineer
ALTERA
Office: (408) 544-8100
Fax: (408) 544-7602
Email: dchow@xxxxxxxxxx
----- Original Message -----
From: "Joseph Kochumman" <k.joseph@xxxxxxxxxxxxx>
Subject: [SI-LIST] Re: Effect of Temperature on Metal Conductivity
Date: Tue, 23 Nov 2004 10:39:34 +0530
Dear Zhangkun,
In most of the metals resistivity increase with temperature (increase in
mobility but more collisions).// Phenomenon of superconductivity occurs
when we decrease the temperature very low. ..
For semiconductors resistivity decreases with temperatrure.. Also the
same with characteristics of thermistors.
Conductivity is the inverse of resistivity.
Rgrds
jozef
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