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Probing the electrostatics of integer quantum hall edges with momentum-resolved tunnel spectroscopy

Huber, Michael ; Grayson, M. ; Schuh, Dieter ; Bichler, Max ; Biberacher, W. ; Wegscheider, Werner ; Abstreiter, Gerhard
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Date of publication of this fulltext: 11 Jan 2010 13:18


Abstract

We present measurements of momentum-resolved magneto-tunneling from a perpendicular two-dimensional (2D) contact into integer quantum Hall (QH) edges at a sharp-edge potential created by cleaved-edge overgrowth. Resonances in the tunnel conductance correspond to coincidences of electronic states of the QH edge and the 2D contact in energy–momentum space. With this dispersion relation reflecting ...

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