Condensed Matter Physics Seminar
Friday, February 5, 1999, 2 p.m.
Plant Sciences Building, Room 1130
Doubled Fun with Double-layer Half-filled Landau Levels
Yong Baek Kim
(Department of Physics, the Pennsylvania State University)
Abstract: We consider interacting two dimensional electrons
in the quantum Hall regime when the lowest Landau level is half-filled.
The system behaves like an exotic Fermi liquid in the sense that the Fermi
liquid criterion is marginally violated. We show that, in the case of double-layer
system, the Fermi liquid criterion is more severely violated. As a result,
the Coulomb drag resistivity shows singular temperature dependence compared
to the Fermi liquid case. We compare these results with the recent experimental
data of J.P.Eisenstein's group at Caltech.
Host: Sankar Das Sarma
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