Disorder-tuned transition between a quantum Hall liquid and Hall insulator

Journal Article · Thu Jun 15 00:00:00 EDT 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.51.18033· OSTI ID:69499

Wong, L W; Jiang, H W ^[1]; Trivedi, N ^[2]; Palm, E ^[3]

---

1. Department of Physics, University of California at Los Angeles, Los Angeles, California 90024 (United States)
2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
3. National High Magnetic Field Laboratory, Tallahassee, Florida 32306 (United States)

We report measurements of the disorder-driven phase transition from a quantum Hall liquid to Hall insulator at {nu}=1/3 and {nu}=2 observed in a two-dimensional electron gas. The data show good scaling behavior over a wide range of densities and temperatures with an exponent 1/{ital zx}{similar_to}0.43 for both {nu}=1/3 and 2, where {ital z} is the dynamical exponent and {ital x} is the correlation length exponent. The critical conductance at the transition is found to be {sigma}{sub {ital xx}}=0.09{plus_minus}0.01{ital e}{sup 2}/{ital h} for the {nu}=1/3 transition and {sigma}{sub {ital xx}}=0.9{plus_minus}0.15{ital e}{sup 2}/{ital h} for the {nu}=2 case.

• OSTI ID: 69499
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 24 Vol. 51; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ALUMINIUM ARSENIDES
ELECTRIC CONDUCTIVITY
ELECTRONIC STRUCTURE
GALLIUM ARSENIDES
HALL EFFECT
HETEROJUNCTIONS
ORDER-DISORDER TRANSFORMATIONS
QUANTIZATION
SCALING LAWS
SUBSTOICHIOMETRY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TRANSPORT THEORY