Coulomb blockade doppelgängers in quantum Hall states

Coulomb blockade doppelgängers in quantum Hall states

Parsa Bonderson,1 Chetan Nayak,1,2 and Kirill Shtengel3,4 1Microsoft Research, Station Q, Elings Hall, University of California, Santa Barbara, California 93106, USA 2Department of Physics, University of California, Santa Barbara, California 93106, USA 3Department of Physics and Astronomy, University of California at Riverside, Riverside, California 92507, USA 4Institute for Quantum Information...

Coulomb blockade and kondo effect in a quantum Hall antidot.

We propose a general capacitive model for an antidot, which has two localized edge states with different spins in the quantum Hall regime. The capacitive coupling of localized excess charges, which are generated around the antidot due to magnetic flux quantization, and their effective spin fluctuation can result in Coulomb blockade, h/(2e) Aharonov-Bohm oscillations, and the Kondo effect. The r...

Coulomb blockade in the fractional quantum Hall effect regime

We use chiral Luttinger liquid theory to study transport through a quantum dot in the fractional quantum Hall effect regime and find rich non-Fermi-liquid tunneling characteristics. In particular, we predict a remarkable Coulomb-blockade-type energy gap that is quantized in units of the noninteracting level spacing, powerlaw tunneling exponents for voltages beyond threshold, and a line shape as...

Bilayer paired quantum Hall states and Coulomb drag

Imaging of Coulomb-driven quantum Hall edge states.

The edges of a two-dimensional electron gas (2DEG) in the quantum Hall effect (QHE) regime are divided into alternating metallic and insulating strips, with their widths determined by the energy gaps of the QHE states and the electrostatic Coulomb interaction. Local probing of these submicrometer features, however, is challenging due to the buried 2DEG structures. Using a newly developed microw...