Near-field optical mapping of quantum Hall edge states.
Phys Rev Lett
; 107(25): 256803, 2011 Dec 16.
Article
in En
| MEDLINE
| ID: mdl-22243101
ABSTRACT
We report on the mapping of quantum-Hall edge states by quasiresonant photovoltage measurements using a near-field scanning optical microscope. We have observed fine structures near sample edges that shift inward with an increase in magnetic field in accordance with the shift of the positions of the quantum-Hall edge states. We have found a transition from the weak disorder regime where compressible-incompressble strips are visible to the strong disorder regime where fluctuations smear out incompressible strips.
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Database:
MEDLINE
Language:
En
Journal:
Phys Rev Lett
Year:
2011
Type:
Article
Affiliation country:
Japan