Comparing the local density of states of three- and two-dimensional electron systems by low-temperature scanning tunneling spectroscopy
Autor(en): | Morgenstern, M Haude, D Klijn, J Meyer, C Sacharow, L Heinze, S Blugel, S Wiesendanger, R |
Stichwörter: | ANTIFERROMAGNETISM; DOPANTS; GAS; METAL-INSULATOR-TRANSITION; Nanoscience & Nanotechnology; OSCILLATIONS; Physics; Physics, Condensed Matter; SCATTERING; Science & Technology - Other Topics; STEPS; SURFACE-STATE; WAVES | Erscheinungsdatum: | 2003 | Herausgeber: | ELSEVIER | Journal: | PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | Volumen: | 16 | Ausgabe: | 1 | Startseite: | 121 | Seitenende: | 128 | Zusammenfassung: | Scanning tunneling spectroscopy performed at T = 6 K is used to investigate the local density of states (LDOS) of electron systems in the bulk conduction band of InAs. In particular, the 3DES of the n-doped material and an adsorbate-induced 2DES located at the surface are investigated at B = 0 and 6 T. It is found that the 3DES at B = 0 T can be described by Bloch states weakly, interacting with the potential disorder, The 2DES at B = 0 T exhibits much stronger LDOS corrugations revealing the tendency of weak localization. In a magnetic field both systems show drift states, which are expected in 2D, but are surprising in 3D, where they point to a new electron phase consisting of droplets of quasi 2D-systems. (C) 2002 Elsevier Science B.V. All rights reserved. |
Beschreibung: | 12th International Winterschool on New Developments in Solid State Physics, MAUTENDORF, AUSTRIA, FEB 25-MAR 01, 2002 |
ISSN: | 13869477 | DOI: | 10.1016/S1386-9477(02)00585-4 |
Zur Langanzeige
Seitenaufrufe
81
Letzte Woche
1
1
Letzter Monat
2
2
geprüft am 29.03.2024