Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10128701 | Solid State Communications | 2018 | 5 Pages |
Abstract
We investigate the coupling between quantum Hall (QH) edge channels (ECs) located at opposite sides of a 50-μm-wide Hall bar by exciting a charged wavepacket in one EC and detecting time-dependent current in the other EC. In a QH state, the current shows a peak followed by a dip, demonstrating the existence of capacitive coupling across the incompressible two-dimensional electron system (2DES). The observed magnetic field dependence of the amplitude and time delay of the current suggests that the capacitance is affected by the presence of localized states. We also show that the dominant manner of the coupling changes gradually as the system changes between the QH and non-QH states.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Ngoc Han Tu, Masayuki Hashisaka, Takeshi Ota, Yoshiaki Sekine, Koji Muraki, Toshimasa Fujisawa, Norio Kumada,