Phonons, electron-phonon coupling and superconductivity in Mo Sb ...
Phonons, electron-phonon coupling and superconductivity in Mo Sb ...
Phonons, electron-phonon coupling and superconductivity in Mo Sb ...
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Superconductivity happens when the charge carriers overcome their<br />
mutual repulsion <strong>and</strong> b<strong>in</strong>d together <strong>in</strong>to Cooper pairs.<br />
In conventional, low-temperature superconductors, <strong>phonon</strong>s - quantized vibrations<br />
of the crystal lattice - are responsible for this pair<strong>in</strong>g.<br />
Hg (1911) ........ MgB 2<br />
(2001) ........<br />
CeCu 2<br />
Si 2<br />
– (1973)<br />
UBe 13<br />
- (1983)<br />
UPt 3<br />
– (1984)<br />
PuCoGa 5<br />
– ( P.Piekarz et al., PRB 72,014521 (2005))<br />
an unconventional mechanism with antiferromagnetic fluctuations<br />
Pair<strong>in</strong>g between fermions can be either <strong>in</strong>duced by <strong>phonon</strong>s, magnons or mediated<br />
by some other boson field.<br />
Experimental arguments that the superconduct<strong>in</strong>g properties are not <strong>in</strong>duced by <strong>phonon</strong>s<br />
●<br />
the quadratic temperature dependence of electrical resistivity<br />
● Fermi energy considerably lower than ħω D
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