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On the Possibility of Exchange Induced Pairing Mechanism in Model Heavy Fermion Superconducting Systems
Author(s) -
Ghosh S. C.,
Ghosh N. K.,
Sarkar R. L.
Publication year - 1991
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221650120
Subject(s) - pairing , superconductivity , condensed matter physics , physics , context (archaeology) , fermion , exchange interaction , singlet state , electron , electron exchange , electron pair , quantum mechanics , paleontology , ferromagnetism , biology , excited state
The periodic Anderson model extended by exchange induced non‐phononic pairing interaction between f‐ and d‐electrons is investigated in the context of singlet like superconductivity. d–d, f–f, and f–d pair density functions are calculated and the stability of different pairing due to various interactions are studied. f–d cross‐over effect is observed and the exchange interaction is found to have the effect of stabilising the pairing; low temperature specific heat is calculated and explained.