fenomenološka teorija supravodljivosti - Odjel za fiziku - Sveučilište ...

superconducting metal, and the total trapped flux must remain constant, being maintained
by circulating supercurrents in the ring itself.
Specific heat: In the superconducting state, the specific heat C s initially exceeds C n for
T≤Tc, but then drops below Cn and vanishes exponentially as T→0.
C
s
exp ∆ 0
∝
−
k T
For most superconducting elements, ∆ 0 is somewhat less than 2k B T C.
Isotops effect: Careful studies of isotopically pure samples show that the ionic lattice
plays an important role in superconductivity. For the transition temperature typically
varies with the ionic mass.
T C
B
1
−
2
∝ M
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