Fermi edge singularities in transport through lateral GaAs quantum dots
Mesoscale and Nanoscale Physics
2017-02-06 v1
Abstract
We measure tunnelling currents through electrostatically defined quantum dots in a GaAs/AlGaAs heterostructure connected to two leads. For certain tunnelling barrier configurations and high sample bias we find a pronounced resonance associated with a Fermi edge singularity. This many-body scattering effect appears when the electrochemical potential of the quantum dot is aligned with the Fermi level of the lead less coupled to the dot. By changing the relative tunnelling barrier strength we are able to tune the interaction of the localised electron with the Fermi sea.
Cite
@article{arxiv.1702.00935,
title = {Fermi edge singularities in transport through lateral GaAs quantum dots},
author = {Tobias Krähenmann and Livio Ciorciaro and Christian Reichl and Werner Wegscheider and Leonid Glazman and Thomas Ihn and Klaus Ensslin},
journal= {arXiv preprint arXiv:1702.00935},
year = {2017}
}