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- Title
MAPPING OF QUANTUM-HALL EDGE CHANNELS BY A DILUTION-REFRIGERATOR BASED NEAR-FIELD SCANNING OPTICAL MICROSCOPE.
- Authors
ITO, H.; FURUYA, K.; SHIBATA, Y.; OOTUKA, Y.; NOMURA, S.; KASHIWAYA, S.; YAMAGUCHI, M.; TAMURA, H.; AKAZAKI, T.
- Abstract
A real-space mapping of photovoltage near the edge of the Hall-bar of a GaAs/AlGaAs single heterojunction has been obtained using a dilution-refrigerator-based near-field scanning optical microscope in magnetic fields. The optical probe-sample surface distance dependence of photovoltage is investigated. We obtain photovoltage profile in the vicinity of the edge, which reflects the local chemical potential of the two-dimensional electron gas determined by the distribution of the compressible and incompressible strips.
- Subjects
QUANTUM Hall effect; DILUTION; NEAR-field microscopy; PHOTOELECTRICITY; GALLIUM arsenide; MAGNETIC fields; COMPRESSIBILITY
- Publication
Journal of Nonlinear Optical Physics & Materials, 2010, Vol 19, Issue 4, p563
- ISSN
0218-8635
- Publication type
Article
- DOI
10.1142/S0218863510005467