Phonon spectral density in a GaAs/AlGaAs double quantum dot

A. Hofmann, C. Karlewski, A. Heimes, C. Reichl, W. Wegscheider, G. Schön, K. Ensslin, T. Ihn, V. F. Maisi

Research output: Contribution to journalArticlepeer-review

2 Citations (SciVal)

Abstract

We study phonon emission in a GaAs/AlGaAs double quantum dot by monitoring the tunneling of a single electron between the two dots. We prepare the system such that a known amount of energy is emitted in the transition process. The energy is converted into lattice vibrations, and the resulting tunneling rate depends strongly on the phonon scattering and its effective phonon spectral density. We are able to fit the measured transition rates and see imprints of interference of phonons with themselves causing oscillations in the transition rates.
Original languageEnglish
Article number033230
Number of pages6
JournalPhysical Review Research
Volume2
Issue number3
DOIs
Publication statusPublished - 2020 Aug 10

Subject classification (UKÄ)

  • Condensed Matter Physics

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