Friday, July 22, 2011, 1:30 pm — CFN, Bldg 735, Conference Room B
"I demonstrate an innovative quantum Hall circuit with variable geometry employing the moveable electrostatic potential induced by a biased atomic force microscope tip. I exploited this additional degree of freedom to measure the width of incompressible stripes in both integer and fractional channels and to identify the microscopic mechanisms that allow two co-propagating edge channels to equilibrate their charge imbalance. This work provides also an experimental realization of a beam mixer between co-propagating edge channels, a still elusive building block of a recently proposed new class of quantum interferometers."
Hosted by: Peter Sutter
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