MIT Department of Electrical Engineering & Computer Science
A Journey through New Quantum Phases of Bilayered Electrons
Harindran Manoharan
Princeton University
Monday, May 5, 1997
4:15 PM (4:00 refreshments)
Grier Room, Room 34-401A
EECS Special Seminar
Abstract
The ground states of a two-dimensional (2D) electron system in an
intense magnetic field have been the subject of numerous
scientific studies. Imagine putting a second 2D system in close
proximity to the first one in order to probe the importance of
electron interactions to the fundamental "quantum phases" of the
system, i.e., those stable at absolute zero temperature. We are
able to experimentally fabricate such as system through
ultra-clean molecular beam epitaxy semiconductor growth. In the
final device, probed at temperatures down to 20 milliKelvin, we
can tune in situ the spacing between two high-mobility 2D electron
layers all the way from two distant non-interacting layers to the
point where the bilayers merge together into a single 2D
monolayer. As a function of this evolution, electrical transport
shows that the device operates in modes ranging from a perfect
conductor to a perfect insulator in a complex manner. We will
describe the engineering behind the fabrication and measurement
of this system, as well as the new physical phenomena it has
allowed us to explore.
URL of this page:
http://www-eecs.mit.edu/AY96-97/events/33.html
Created: Mar 30, 1997
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Modified: Jun 24, 1997
This announcement is from the MIT EECS 1996-97 archive.
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