Lecturer: Prof. Yizhak Yacoby
(And Dr. Yakov Girshberg)
Affiliation: Racah Institute of Physics,
The Hebrew University of Jerusalem
Abstract:
We propose a model of
Cooper like pairing induced
by the large ion
polarizabilities of O^2- in
Bismutates and Cuprates and
As^3- and Se^2- in the iron
pnictides. We show that the
electrical potential field
induced by a charge carrier
contains in its vicinity
pockets of negative potential
causing charge carriers to
attract each other. Using this
model we calculate the
approximate pairing and gap
energies showing they are
compatible with the gap
energies measured in high Tc
superconductors. Furthermore we show that
the coherence length and the
gap energy dependence on
doping are consistent with
those observed in high Tc
systems.