Counter-propagating charge transport in the quantum Hall effect regime

• Published in: Science (American Association for the Advancement of Science) Vol. 363; no. 6422; pp. 54 - 57
• Main Authors: Lafont, Fabien, Rosenblatt, Amir, Heiblum, Moty, Umansky, Vladimir
• Format: Journal Article
• Language: English
• Published: United States American Association for the Advancement of Science 04.01.2019; The American Association for the Advancement of Science
• Subjects: Aluminum gallium arsenides; Charge transport; Current carriers; Electromagnetism; Electron gas; Electrons; Gallium arsenide; Heterostructures; Magnetic fields; Quantum Hall effect; Upstream

The quantum Hall effect, observed in a two-dimensional (2D) electron gas subjected to a perpendicular magnetic field, imposes a 1D-like chiral, downstream, transport of charge carriers along the sample edges. Although this picture remains valid for electrons and Laughlin’s fractional quasiparticles,...