217 citations · 893 across the 33 of their papers we have counts for
13 papers · 1 filter
Temperature dependent equilibration of spin orthogonal quantum Hall edge modes
Tanmay Maiti, Pooja Agarwal, Suvankar Purkait +5
Conductance of the edge modes as well as conductance across the co-propagating edge modes around the ν= 4/3, 5/3 and 2 quantum Hall states are measured by individually exciting the…
Magnetic field dependent equilibration of fractional quantum Hall edge modes
Tanmay Maiti, Pooja Agarwal, Suvankar Purkait +5
Fractional conductance is measured by partitioning edge state using gate-tunable fractional quantum Hall (FQH) liquids of filling 1/3 or 2/3 for current injection and detect…
Quantum Hall realization of polarized intensity interferometry
Krishanu Roychowdhury, Disha Wadhawan, Poonam Mehta +2
We combine the ideas of intensity interferometry, polarization optics and Bell's measurement into an experimental proposal which is hosted in a = quantum Hall (QH) edge s…
Nanoscale Mach-Zehnder interferometer with spin-resolved quantum Hall edge states
Biswajit Karmakar, Davide Venturelli, Luca Chirolli +7
We realize a nanoscale-area Mach-Zehnder interferometer with co-propagating quantum Hall spin-resolved edge states and demonstrate the persistence of gate-controlled quantum interf…
Electron-hole pairing in graphene-GaAs heterostructures
A. Gamucci, D. Spirito, M. Carrega +8
Vertical heterostructures combining different layered materials offer novel opportunities for applications and fundamental studies of collective behavior driven by inter-layer Coul…
Evidence of inter-layer interaction in magneto-luminescence spectra of electron bilayers
Ilirjan Aliaj, Vittorio Pellegrini, Andrea Gamucci +4
Magneto-luminescence studies in electron bilayers reveal the hallmarks of the even-denominator and other quantum Hall states in the intensities and energies of the inter-band optic…
Controlled coupling of spin-resolved quantum Hall edge states
Biswajit Karmakar, Davide Venturelli, Luca Chirolli +8
Topologically-protected edge states are dissipationless conducting surface states immune to impurity scattering and geometrical defects that occur in electronic systems characteriz…
Delocalized-localized transition in a semiconductor two-dimensional honeycomb lattice
G. De Simoni, A. Singha, M. Gibertini +7
We report the magneto-transport properties of a two-dimensional electron gas in a modulation-doped AlGaAs/GaAs heterostructure subjected to a lateral potential with honeycomb geome…
Optical Anisotropy of Electronic Excitations in Elliptical Quantum Dots
Achintya Singha, Vittorio Pellegrini, Sokratis Kalliakos +4
The authors report that anisotropic confining potentials in laterally-coupled semiconductor quantum dots (QDs) have large impacts in optical transitions and energies of inter-shell…
Evidence of a first-order quantum phase transition of excitons in electron double layers
Biswajit Karmakar, Vittorio Pellegrini, Aron Pinczuk +2
Complexity in many-particle systems occurs through processes of qualitative differentiation. These are described by concepts such as emerging states with specific symmetries that a…
Metamorphosis of a Quantum Hall Bilayer State into a Composite Fermion Metal
Biswajit Karmakar, Stefano Luin, Vittorio Pellegrini +4
Composite fermion metal states emerge in quantum Hall bilayers at total Landau level filling factor =1 when the tunneling gap collapses by application of in-plane components o…
Probing electrodynamical properties of the edge states in a quantum Hall system by surface photovoltage spectroscopy
B. Karmakar, G. H. Dohler, B. M. Arora
An importent question regarding the dissipation-less current carried by the edge states in a quantum Hall system is understanding the results of the electrodynamical interaction am…
The effects of macroscopic inhomogeneities on the magneto transport properties of the electron gas in two dimensions
B. Karmakar, M. R. Gokhale, A. P. Shah +5
In experiments on electron transport the macroscopic inhomogeneities in the sample play a fundamental role. In this paper and a subsequent one we introduce and develop a general fo…