GREPhysics.NET: GR9677 #95

GR9677 #95

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Advanced Topics $\Rightarrow$ }Solid State Physics

The specific heat of a superconductor jumps at the critical temperature (c.f. with its resistivity jump).

Ordinarily, the specific heat of a metal is $c=aT+bT^3$ . When it is superconducting, the first term, the electronic-contribution, is replaced by $\approx e^{-cT}$ . The revised plot of the specific heat has a jump from an exponentially increasing specific heat to a much lower value somewhere in the range for positive T.

Reference: Ibach and Luth p 270ff

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Comments

lathena
2009-10-04 15:46:48

So then the answer is (E), correct?

cathaychris
2011-10-14 01:24:50

Yes.

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sharpstones
2007-04-06 15:01:10

It's good to know that a phase transition is characterized by a discontinuous jump in a physical quantity. The switchover from normal metal to superconducting state is a phase transition and is characterized by a discontinuous jump in the Heat Capacity.

kammyuce
2011-11-08 13:20:57

yes. to add more to it...1st order phase transitions has their physical quantities (order parameter and dependent quantities) following a discontinuous or kinked curve.
There are alo 2nd order transitions which have a smooth variation. Nonetheless, superconductivity (Type I) is a 1st order transtition.

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So then the answer is (E), correct?

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