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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