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Борис В. Васильев Сверхтекучесть и Сверхпроводимость
Борис В. Васильев
Сверхтекучесть и Сверхпроводимость
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1.0<br />
log T c<br />
Pb<br />
0.5<br />
Sn<br />
In<br />
Hg<br />
Tl<br />
0.0<br />
Ga<br />
Zn<br />
Al<br />
Cd<br />
log T F<br />
-0.5<br />
5.0 5.5 6.0 6.5<br />
Ðèñ. 6.1. Ñðàâíåíèå êðèòè÷åñêîé òåìïåðàòóðû T c<br />
ñâåðõïðîâîäíèêîâ I ðîäà ñ èõ òåìïåðàòóðîé Ôåðìè<br />
T F . Ïðÿìàÿ ëèíèÿ ñîîòâåòñòâóåò ðàâåíñòâó (65), êîòîðîå<br />
êàê âèäíî îïðåäåëÿåò äëÿ ñâåðõïðîâîäíèêîâ I<br />
ðîäà âåðõíþþ ãðàíèöó èõ êðèòè÷åñêîé òåìïåðàòóðû.<br />
erg<br />
superconductors T c (measur),K γ, T<br />
cm 3 K 2 c (calc),K Tc(calc)<br />
T c(meas)<br />
Eq.(68)<br />
Cd 0.517 532 0.77 1.49<br />
Zn 0.85 718 1.41 1.65<br />
Ga 1.09 508 0.70 0.65<br />
Tl 2.39 855 1.99 0.84<br />
In 3.41 1062 3.08 0.90<br />
Sn 3.72 1070 3.12 0.84<br />
Hg 4.15 1280 4.48 1.07<br />
Pb 7.19 1699 7.88 1.09<br />
Òàáëèöà 6.2. Ñðàâíåíèå âû÷èñëåííîé êðèòè÷åñêîé<br />
òåìïåðàòóðû ñ äàííûìè èçìåðåíèé<br />
2. Êðèòè÷åñêèå ïàðàìåòðû<br />
ñâåðõïðîâîäíèêîâ I ðîäà<br />
ßâëåíèå êîíäåíñàöèè íóëåâûõ êîëåáàíèé â<br />
ýëåêòðîííîì ãàçå èìååò õàðàêòåðíûå ÷åðòû.<br />
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