SciPost Phys. 3, 032 (2017) ·
published 29 October 2017
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Topological aspects represent currently a boosting area in condensed matter
physics. Yet there are very few suggestions for technical applications of
topological phenomena. Still, the most important is the calibration of
resistance standards by means of the integer quantum Hall effect. We propose
modifications of samples displaying the integer quantum Hall effect which
render the tunability of the Fermi velocity possible by external control
parameters such as gate voltages. In this way, so far unexplored possibilities
arise to realize devices such as tunable delay lines and interferometers.
