Deutsch
 
Benutzerhandbuch Datenschutzhinweis Impressum Kontakt
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Buchkapitel

Superconductivity of strongly correlated electrons: heavy-fermion systems

MPG-Autoren
Es sind keine MPG-Autoren in der Publikation vorhanden
Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Steglich, F. (1990). Superconductivity of strongly correlated electrons: heavy-fermion systems. In Earlier and Recent Aspects of Superconductivity. Lectures from the International School (pp. 306-325).


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0019-D521-4
Zusammenfassung
The Cooper pairs in the superconductors CeCu 2Si 2, UBe 13, UPt 3, and URu 2Si 2 are formed by quasiparticles with effective mass m* of order 100 m el. m* originates in very strong correlations between f-electrons which become weakly delocalized well below a characteristic temperature T*~5-50 K via a Kondo-type mechanism. These `heavy fermions' dominate the low-temperature properties of a number of lanthanide- and actinide-based compounds, spanning the full range between coherent Fermi liquid, band magnetism and superconductivity. The pairing interaction in the `heavy-fermion superconductors' is likely to differ from the BCS-type phonon-mediated coupling. In addition, their order parameters appear to be highly anisotropic. Most of the experimental evidence points to even-parity (`singlet') rather than odd-parity (`triplet') pairing.