2018/07/02 by B A Braem, C Gold, S Hennel +7
Biochemistry, Genetics and Molecular Biology · Materials Science · Physics and Astronomy · #Advanced Electron Microscopy Techniques and Applications #Amplitude #Chemical and Physical Properties of Materials #Dopant #Electron #Electron flow #Fermi Gamma-ray Space Telescope #Fermi energy #Fermi level #Quantum and electron transport phenomena #Scanning electron microscope #Scanning gate microscopy #cond-mat.mes-hall
paper · pdf · doi:10.1088/1367-2630/aad068
published as New Journal of Physics 20, (2018) 073015 · Accepted for publication in New Journal of Physics
openalex publication_date 2018/07/02 · arxiv created 2018/07/08 · openalex created_date 2018/07/10 · arxiv updated 2018/07/12 · openalex updated_date 2026/08/06
The pattern of branched electron flow revealed by scanning gate microscopy shows the distribution of ballistic electron trajectories. The details of the pattern are determined by the correlated potential of remote dopants with an amplitude far below the Fermi energy. We find that the pattern persists even if the electron density is significantly reduced such that the change in Fermi energy exceeds the background potential amplitude. The branch pattern is robust against changes in charge carrier density, but not against changes in the background potential caused by additional illumination of the sample.