Subsurface charge accumulation imaging of a quantum Hall liquid
Authors:
- S. H. TessmerSTS. H. Tessmer
- P. I. GlicofridisPGP. I. Glicofridis
- R. C. AshooriRAR. C. Ashoori
- L. S. LevitovLLL. S. Levitov
- M. R. MellochMMM. R. Melloch
Preprint
Abstract
The unusual properties of two-dimensional electron systems that give rise to the quantum Hall effect have prompted the development of new microscopic models for electrical conduction. The bulk properties of the quantum Hall effect have also been studied experimentally using a variety of probes including transport, photoluminescence, magnetization, and capacitance measurements. However, the fact that two-dimensional electron systems typically exist some distance (about 100 nm) beneath the surface of the host semiconductor has presented an important obstacle to more direct measurements of microscopic electronic structure in the quantum Hall regime. Here we introduce a cryogenic scanning-probe technique-- subsurface charge accumulation imaging-- that permits very high resolution examination of systems of mobile electrons inside materials. We use it to image directly the nanometer-scale electronic structures that exist in the quantum Hall regime.Keywords
All Related Versions
- Version 1, 1998-11-10, ArXiv
- Published version: Nature, 392 (6671), 51.
This publication has 24 references indexed in Scilit:
- Cryogenic scanning probe characterization of semiconductor nanostructuresApplied Physics Letters, 1996
- Semiconductor characterization with the scanning surface harmonic microscopeApplied Physics Letters, 1994
- A tunable microwave frequency alternating current scanning tunneling microscopeReview of Scientific Instruments, 1994
- Quantum Dots in Strong Magnetic Fields: Stability Criteria for the Maximum Density DropletAustralian Journal of Physics, 1993
- The Landau level density of states as a function of Fermi energy in the two dimensional electron gasSolid State Communications, 1992
- Lateral dopant profiling with 200 nm resolution by scanning capacitance microscopyApplied Physics Letters, 1989
- Non-linear screening and the background density of 2DEG states in magnetic fieldSolid State Communications, 1988
- The quantum Hall effect: A sum ruleSurface Science, 1984
- On the conductivity of two dimensional electrons in a strong magnetic fieldSolid State Communications, 1982
- Zero-resistance state of two-dimensional electrons in a quantizing magnetic fieldPhysical Review B, 1982