2002/02/14 by M. Morgenstern, Markus Morgenstern, J. Klijn +11 · 80 citations
Physics and Astronomy · #Condensed matter physics #Density of states #Electron #Electron density #Electron localization function #Local density of states #Physics #Quantum and electron transport phenomena #Quantum mechanics #Semiconductor Quantum Structures and Devices #Spectroscopy #Surface and Thin Film Phenomena #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.89.136806
published in Physical Review Letters 89(13), 136806 (American Physical Society) · 7 pages, 4 figures, submitted to PRL
arxiv created 2002/02/14 · openalex publication_date 2002/09/09 · arxiv updated 2016/08/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The local density of states (LDOS) of the adsorbate-induced two-dimensional electron system (2DES) on n-InAs(110) is studied by scanning tunneling spectroscopy. In contrast to a similar 3DES, the 2DES LDOS exhibits 20 times stronger corrugations and rather irregular structures. Both results are interpreted as consequences of weak localization. Fourier transforms of the LDOS reveal that the k values of the unperturbed 2DES still dominate the 2DES, but additional lower k values contribute. To clarify the origin of the LDOS patterns, we measure the potential landscape of the 2DES area. We use it to calculate the expected LDOS and find reasonable agreement between calculation and experiment.