4 papers · 1 filter
Imaging correlated wave functions of few-electron quantum dots: Theory and scanning tunneling spectroscopy experiments
Massimo Rontani, Elisa Molinari, Giuseppe Maruccio +7
We show both theoretically and experimentally that scanning tunneling spectroscopy (STS) images of semiconductor quantum dots may display clear signatures of electron-electron corr…
Correlation Effects in Wave Function Mapping of Molecular Beam Epitaxy Grown Quantum Dots
Giuseppe Maruccio, Martin Janson, Andreas Schramm +7
We investigate correlation effects in the regime of a few electrons in uncapped InAs quantum dots by tunneling spectroscopy and wave function (WF) mapping at high tunneling current…
Oscillator strengths of dark charged excitons in the quantum Hall regime
C. Schueller, K. -B. Broocks, Ch. Heyn +1
By direct absorption spectroscopy and comparison to photoluminescence (PL), we investigate negatively charged excitons in dilute two-dimensional electron systems at temperatures do…
Far-Infrared Excitations below the Kohn Mode: Internal Motion in a Quantum Dot
Roman Krahne, Vidar Gudmundsson, Christian Heyn +1
We have investigated the far-infrared response of quantum dots in modulation doped GaAs heterostructures. We observe novel modes at frequencies below the center-of-mass Kohn mode.…