Point-contact conductances at the quantum Hall transition
نویسندگان
چکیده
منابع مشابه
Quantum point contact in a compressible Quantum Hall liquid
We consider electron transport through a quantum point contact between compressible Quantum Hall liquids and derive the contact’s impedance function for both diffusive and ballistic regimes of the bulk electron motion. In either regime, the tunneling current deviates from a power-law behavior I ∼ V 1/ν expected on the basis of the single-mode chiral Luttinger liquid phenomenology.
متن کاملQuantum point contact between compressible Quantum Hall liquids
We elaborate on a theory of electronic transport through a quantum point contact (QPC) in the Quantum Hall (QH) regime, which does not discriminate between compressible and incompressible QH liquids, and accounts for both diffusive and ballistic regimes of the bulk electron motion. In either regime we find departures from the accustomed chiral Luttinger liquid behavior. The results suggest that...
متن کاملFractional quantum Hall effect in a quantum point contact at filling fraction 5/2
Division of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138, USA Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Physics and Astronomy, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA Bell Labs, ...
متن کاملDouble point contact in quantum Hall line junctions.
We show that multiple point contacts on a barrier separating two laterally coupled quantum Hall fluids induce Aharonov-Bohm (AB) oscillations in the tunneling conductance. These quantum coherence effects provide new evidence for the Luttinger liquid behavior of the edge states of quantum Hall fluids. For a two point contact, we identify coherent and incoherent regimes determined by the relative...
متن کاملPoint-contact conductances from density correlations.
We formulate and prove an exact relation which expresses the moments of the two-point conductance for an open disordered electron system in terms of certain density correlators of the corresponding closed system. As an application of the relation, we demonstrate that the typical two-point conductance for the Chalker-Coddington model at criticality transforms like a two-point function in conform...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 1999
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.59.15836