2000/07/07 by Gleb Finkelstein, G. Finkelstein, P. I. Glicofridis +2
Physics and Astronomy · #Atomic physics #Bubble #Condensed matter physics #Electron #Hall effect #Landau quantization #Magnetic field #Mechanics #Optics #Optoelectronics #Physics #Physics of Superconductivity and Magnetism #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum well #Resolution (logic) #Semiconductor #Semiconductor Quantum Structures and Devices #cond-mat.mes-hall
paper · pdf · doi:10.1126/science.289.5476.90
published as Science, vol.289, p.90, 2000 · 4 pages, 3 JPG figures, Revtex. For additional info and AVI movies, visit http://electron.mit.edu/stm
openalex publication_date 2000/07/07 · arxiv created 2000/07/18 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A scanning probe technique was used to obtain a high-resolution map of the random electrostatic potential inside the quantum Hall liquid. A sharp metal tip, scanned above a semiconductor surface, sensed charges in an embedded two-dimensional (2D) electron gas. Under quantum Hall effect conditions, applying a positive voltage to the tip locally enhanced the 2D electron density and created a "bubble" of electrons in an otherwise unoccupied Landau level. As the tip scanned along the sample surface, the bubble followed underneath. The tip sensed the motions of single electrons entering or leaving the bubble in response to changes in the local 2D electrostatic potential.