Hi Zhangkun, Yes, the resistance of metal is dependent on temperature. Electrical resistance comes from electron-electron collisions near the Fermi surface. The mean free path of the electrons determines the rate of collisions and is temperature dependent. Depending on the purity of the metal (and possible crystalline structure), the electrical resistance can change by many orders of magnitude between room temperature and liquid helium (4 Kelvin). See Chapter 6 of "Intro to Solid State Physics" by C. Kittel for a thorough discussion. Thanks! =20 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Daniel Chow, Ph.D. Sr. Product Engineer ALTERA Office: (408) 544-8100 Fax: (408) 544-7602 Email: dchow@xxxxxxxxxx =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D -----Original Message----- Date: Mon, 22 Nov 2004 14:00:02 +0800 From: Zhangkun <zhang_kun@xxxxxxxxxx> Subject: [SI-LIST] Effect of Temperature on Metal Conductivity Dear All Is there any effect of temperature on metal conductivity? In another word, does the resistance of metal change with the temperature? How much? Best Regards Zhangkun 2004.11.22 ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu