Condensed Matter Physics Seminar

Optical self-energy effect in the cuprates

Dr. Jungseek Hwang
Department of Physics
University of Florida

The optical self-energy can be defined within the extended Drude formalism. This quantity is in complete correspondence to the quasipartical self-energy and contains a lot of information about interactions among electrons in strongly correlated systems. It may tell us about the pairing glue between the electrons in the high transition temperature superconductors, the cuprates. We study temperature and doping dependent optical self-energy and extract from this the bosonic spectral function using an (extended) Shulga’s formula within d-wave Eliashberg formalism and compare it with other experimental data; inelastic neutron scattering, tunneling, and angle-resolved photoemission spectroscopy. Our data support the idea that the bosons we observe are magnetic spin fluctuations and mediate the pairing force between electrons in the cuprates.

Monday, October 1, 2007
2:00 pm
Gant Science Complex
Materials Science Building
Room IMS20

(The seminar is followed by coffee/tea, cookies, and an informal discussions.)

© 2007 Department of Physics, University of Connecticut
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