Magnetic Aspects of Superconducting Pairing

• Authors: M. Acquarone , M. Paiusco
• Languages of publication: EN

Abstracts

EN

We discuss some of the recently proposed models dealing with the superconducting state in the presence of strong antiferromagnetic fluctuations, induced by the on-site Coulomb repulsion between electrons (the Hubbard correlation). In the weak coupling limit we treat the influence of correlation effects on the phonon-mediated superconductivity within the BCS-Eliashberg framework. As a non-standard model in this limit we describe next the so-called spin bag model. To discuss strong correlation limit, we describe first the projected Hamiltonian (the t-J Hamiltonian) and the corresponding antiferromagnetic state. The resonating valence bond model is introduced both as a naive version, equivalent to the BCS treatment of the transverse spin fluctuations, as well as a holon-spinon version.

Keywords

EN

74.10.-z; 75.10.Lp; 75.50.Ee

Discipline

• 75.50.Ee: Antiferromagnetics
• 75.10.Lp: Band and itinerant models

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 84
• Issue: 1
• Pages: 101-126

Dates

published

1993-07

Contributors

author

M. Acquarone

• C.N.R., Dipartimento di Fisica dell' Universitá, 43100 Parma, Italy

author

M. Paiusco

• I.N.F.M., Dipartimento di Fisica dell' Universitá, 43100 Parma, Italy

Identifiers

DOI

10.12693/APhysPolA.84.101