Orbitally Controlled Quantum Hall States in Decoupled Two-Bilayer Graphene Sheets.
Sign Up to like & getrecommendations! Published in 2023 at "Advanced science"
DOI: 10.1002/advs.202300574
Abstract: The authors report on integer and fractional quantum Hall states in a stack of two twisted Bernal bilayer graphene sheets. By exploiting the momentum mismatch in reciprocal space, the single-particle tunneling between both bilayers is… read more here.
Keywords: hall states; graphene sheets; bilayer graphene; hall ... See more keywords
6D fractional quantum Hall effect
Sign Up to like & getrecommendations! Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep05(2018)120
Abstract: A bstractWe present a 6D generalization of the fractional quantum Hall effect involving membranes coupled to a three-form potential in the presence of a large background four-form flux. The low energy physics is governed by… read more here.
Keywords: quantum hall; fractional quantum; hall effect; theory ... See more keywords
Exact results for a quantum Hall state with broken rotational symmetry
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Physics and Chemistry of Solids"
DOI: 10.1016/j.jpcs.2019.02.021
Abstract: Abstract The most robust fractional quantum Hall state in a strongly correlated two-dimensional system of electrons occurs at one-third filling factor of the lowest Landau level. This state is characterized as an isotropic quantum liquid… read more here.
Keywords: broken rotational; rotational symmetry; quantum hall; symmetry ... See more keywords
Roton minimum at ν = 1∕2 filled fractional quantum Hall effect of Bose particles
Sign Up to like & getrecommendations! Published in 2018 at "Physica B: Condensed Matter"
DOI: 10.1016/j.physb.2018.08.042
Abstract: Abstract We have studied the collective excitation of fractional quantum Hall effect (FQHE) in the rotating Bose-Einstein condensate (BEC) using CF theory at the filling fraction ν = 1∕2. The roton type of excitation in the FQHE… read more here.
Keywords: quantum hall; minimum; fractional quantum; hall effect ... See more keywords
Ballistic 3-port interferometric logic gates in the quantum Hall regime
Sign Up to like & getrecommendations! Published in 2019 at "Physica E: Low-dimensional Systems and Nanostructures"
DOI: 10.1016/j.physe.2019.01.016
Abstract: We show that a 3-port interferometer, defined by quantum point contacts in a two-dimensional electron gas, and working in the quantum Hall regime, can implement different logic gates at each port depending on the energy… read more here.
Keywords: logic gates; hall regime; quantum hall; port ... See more keywords
Aharonov-Bohm Oscillations in Bilayer Graphene Quantum Hall Edge State Fabry-Pérot Interferometers.
Sign Up to like & getrecommendations! Published in 2022 at "Nano letters"
DOI: 10.1021/acs.nanolett.2c05004
Abstract: Bernal-stacked bilayer graphene exhibits a wealth of interaction-driven phenomena, including robust even-denominator fractional quantum Hall states. We construct Fabry-Pérot interferometers using a split-gate design and present measurements of the Aharonov-Bohm oscillations. The edge state velocity… read more here.
Keywords: fabry rot; aharonov bohm; bilayer graphene; quantum hall ... See more keywords
The quantum Hall effect continues to reveal its secrets to mathematicians and physicists
Sign Up to like & getrecommendations! Published in 2020 at "Nature"
DOI: 10.1038/d41586-020-02230-7
Abstract: A transformative experiment is yielding fresh insights 40 years after the effect’s discovery — and energizing transdisciplinary collaborations. A transformative experiment is yielding fresh insights 40 years after the effect’s discovery — and energizing transdisciplinary… read more here.
Keywords: quantum hall; hall effect; effect continues; effect ... See more keywords
The local nature of incompressibility of quantum Hall effect
Sign Up to like & getrecommendations! Published in 2017 at "Nature Communications"
DOI: 10.1038/ncomms14082
Abstract: Since the experimental realization of the integer quantum Hall effect in a two-dimensional electron system, the interrelation between the conductance quantization and the topological properties of the system has been investigated. Assuming that the two-dimensional… read more here.
Keywords: system; hall; local nature; quantum hall ... See more keywords
Quantum Hall drag of exciton condensate in graphene
Sign Up to like & getrecommendations! Published in 2017 at "Nature Physics"
DOI: 10.1038/nphys4116
Abstract: An electronic double layer, subjected to a high magnetic field, can form an exciton condensate: a Bose–Einstein condensate of Coulomb-bound electron–hole pairs. Now, exciton condensation is reported for a graphene/boron-nitride/graphene structure. read more here.
Keywords: exciton; graphene; quantum hall; hall drag ... See more keywords
Edge channels of broken-symmetry quantum Hall states in graphene visualized by atomic force microscopy
Sign Up to like & getrecommendations! Published in 2021 at "Nature Communications"
DOI: 10.1038/s41467-021-22886-7
Abstract: The quantum Hall (QH) effect, a topologically non-trivial quantum phase, expanded the concept of topological order in physics bringing into focus the intimate relation between the “bulk” topology and the edge states. The QH effect… read more here.
Keywords: broken symmetry; quantum hall; edge; microscopy ... See more keywords
Transport in helical Luttinger liquids in the fractional quantum Hall regime
Sign Up to like & getrecommendations! Published in 2021 at "Nature Communications"
DOI: 10.1038/s41467-021-25631-2
Abstract: Domain walls in fractional quantum Hall ferromagnets are gapless helical one-dimensional channels formed at the boundaries of topologically distinct quantum Hall (QH) liquids. Naïvely, these helical domain walls (hDWs) constitute two counter-propagating chiral states with… read more here.
Keywords: quantum; quantum hall; fractional quantum; luttinger ... See more keywords