Programme

I.3 -- Invited, NCTP-39

Date: Wednesday, 30-07-2014

Time: 10h30 - 11h00

Valence fluctuation mediation on superconductivity in heavy fermion systems

Phan Van Nham (1), Klaus W. Becker (2)

(1) Institute of Research and Development, Duy Tan University, Vietnam (2) Institute for Theoretical Physics, Technical University of Dresden, Germany

Recently, it was claimed that valence fluctuations might be responsible for the formation of a superconducting phase which was found in Ce based heavy-fermion systems under high pressure. Such a phase is investigated for the extended periodic Anderson model in two-dimensions in the framework of the projector-based renormalization method, In this model, an additional local Coulomb repulsion Ufc between the f- and conduction electrons in included. We derive self-consistent equations for the superconducting order parameters which show dominant d-wave symmetry for values of the model parameters close to the valence transition regime.

Presenter: Phan Van Nham