%0 Journal Article
%T Single-impurity tunneling spectroscopy to probe the discrete states of a two-dimensional electron gas in a quantizing magnetic field
%+ Groupe d'étude des semiconducteurs (GES)
%+ Laboratoire de photonique et de nanostructures (LPN)
%+ Institute of Experimental Physics [Warsaw] (IFD)
%+ Laboratoire national des champs magnétiques intenses - Grenoble (LNCMI-G)
%A Jouault, Benoit
%A Gryglas, M.
%A Faini, G.
%A Gennser, U.
%A Cavanna, A.
%A Baj, M.
%A Maude, Dk
%< avec comité de lecture
%Z GES:06-061
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 73
%P 155415
%8 2006
%D 2006
%R 10.1103/PhysRevB.73.155415
%K QUANTUM HALL REGIME
%K COULOMB-BLOCKADE OSCILLATIONS
%K EDGE CHANNELS
%K RESISTANCE FLUCTUATIONS
%K DISORDERED CONDUCTOR
%K FRACTIONAL CHARGE
%K DOT
%K HETEROSTRUCTURES
%K TRANSPORT
%K ANTIDOT
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X A single impurity is used to probe the local density of states of a two-dimensional electron gas (2DEG) in a resonant tunneling experiment. The studies have been performed in the GaAs/AlAs/GaAs system, with Si donors incorporated into the AlAs layer, on submicrometer junctions. The current-voltage characteristics clearly show peaks corresponding to the formation of Landau levels. Moreover, additional fine-structure superimposed on the Landau levels are resolved. Detailed magnetic field studies suggest that those peaks reflect the single particle states of the Landau levels. The surprisingly rapid shift of these additional features in a magnetic field is reproduced in a model, which takes into account disorder in the plane of the 2DEG.
%G English
%L hal-00541608
%U https://hal.science/hal-00541608
%~ UNIV-TLSE3
%~ UGA
%~ CNRS
%~ UNIV-GRENOBLE1
%~ UNIV-MONTP2
%~ GES
%~ UNIV-MONTPELLIER
%~ LNCMI
%~ UNIV-UT3
%~ UT3-INP
%~ UT3-TOULOUSEINP
%~ UM1-UM2