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Signatures of an Anomalous Nernst Effect in a Mesoscopic Two-Dimensional Electron System
Srijit Goswami, Christoph Siegert, Michael Pepper +3
We investigate the Nernst effect in a mesoscopic two-dimensional electron system (2DES) at low magnetic fields, before the onset of Landau level quantization. The overall magnitude…
Giant Stark effect in the emission of single semiconductor quantum dots
Anthony. J. Bennett, Raj. B. Patel, Joanna Skiba-Szymanska +4
We study the quantum-confined Stark effect in single InAs/GaAs quantum dots embedded within a AlGaAs/GaAs/AlGaAs quantum well. By significantly increasing the barrier height we can…
Thermoelectric Properties of Electrostatically Tunable Antidot Lattices
Srijit Goswami, Christoph Siegert, Saquib Shamim +4
We report on the fabrication and characterization of a device which allows the formation of an antidot lattice (ADL) using only electrostatic gating. The antidot potential and Ferm…
Evidence of gate-tunable topological excitations in two-dimensional electron systems
R. Koushik, Matthias Baenninger, Vijay Narayan +5
Topological defects are ubiquitous from solid state physics to cosmology, where they drive phase transitions by proliferating as domain walls, monopoles or vortices. As quantum exc…
Charge and spin state readout of a double quantum dot coupled to a resonator
K. D. Petersson, C. G. Smith, D. Anderson +3
State readout is a key requirement for a quantum computer. For semiconductor-based qubit devices it is usually accomplished using a separate mesoscopic electrometer. Here we demons…