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Quantum dot spectroscopy of proximity-induced superconductivity in a two-dimensional electron gas
Fabio Deon, Vittorio Pellegrini, Francesco Giazotto +3
We report the realization of a hybrid superconductor-quantum dot device by means of top-down nanofabrication starting from a two dimensional electron gas in a InGaAs/InAlAs semicon…
Observation of magneto-phonon resonance of Dirac fermions in graphite
J. Yan, S. Goler, T. D. Rhone +5
Coherent coupling of Dirac fermion magneto-excitons with an optical phonon is observed in graphite as marked magnetic-field dependent splittings and anti-crossing behavior of the t…
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…
Singlet-triplet transition in a few-electron lateral InGaAs-InAlAs quantum dot
F. Deon, V. Pellegrini, F. Carillo +4
The magnetic-field evolution of Coulomb blockade peaks in lateral InGaAs/InAlAs quantum dots in the few-electron regime is reported. Quantum dots are defined by gates evaporated on…
Correlated electrons in optically-tunable quantum dots: Building an electron dimer molecule
Achintya Singha, Vittorio Pellegrini, Aron Pinczuk +3
We observe the low-lying excitations of a molecular dimer formed by two electrons in a GaAs semiconductor quantum dot in which the number of confined electrons is tuned by optical…