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Comparison
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Comparison

The different materials

Let us compare the characteristic lengths of some of the superconductors mentioned in this section (inspired from the book Superconductivity, Physics and applications, K. Fossheim & A. Sudbo, Wiley & Sons ed.)

        

Exemples

TCmax (K)

Theory

Type

BCmax(T)

ξ(nm)

λ (nm)

Metals

Hg

A few K

BCS

I

From 0.01 to 0.1

About 1000 nm

65

Alloys

Nb3Sn

18 K

BCS

II

24

3

65

Diborure de magnésium

MgB2

39 K

BCS with 2 bands

II

<=  50 T

15 nm

 50 nm

Heavy Fermions
Lanthanides
Actinides


CeCoIn5
PuGaIn5


2.5 K
18.5 K

?

II


>10 T
27 T

12

600

Organic superconductors

k-BEDTTTF2
CuNCS2
...

10.5

?

II

 

1 à 10

980

Fullerenes

K3C60
Cs3C60

40 K

?

II

<= 30 T

3

240

Cuprate

YBa2Cu3O7

92

?

II

115 T

0.5 to 2.5

150 to 500

Pnictide

Ba(Fe1-xCox)2As2

56

?

II

~60 T

A few nm

A few hundreds

 

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