164
Views
11
CrossRef citations to date
0
Altmetric
Nimrod Moiseyev

Acoustic phonon impact on the inter-Coulombic decay process in charged quantum dot pairs

ORCID Icon
Pages 2014-2028 | Received 28 Sep 2018, Accepted 18 Jan 2019, Published online: 03 Feb 2019
 

ABSTRACT

Recently, highly accurate multi-configuration time-dependent Hartree electron dynamics calculations demonstrated the efficient long-range energy transfer inter-Coulombic decay (ICD) process to happen in charged semiconductor quantum dot (QD) pairs. ICD is initiated by intraband photoexcitation of one of the QDs and leads to electron emission from the other within a duration of about 150 ps. On the same time scale electronically excited states are reported to relax due to the coupling of electrons to acoustic phonons. Likewise, phonons promote ionisation. Here, the QDs' acoustic breathing mode is implemented in a frozen-phonon approach. A detailed comparison of the phonon effects on electron relaxation and emission as well as on the full ICD process is presented, which supports the previous empirical finding of ICD being the dominant decay channel in paired QDs. In addition the relative importance of phonon–phonon, phonon–electron and electron–electron interaction is analysed.

GRAPHICAL ABSTRACT

Acknowledgements

In 2011 Nimrod Moiseyev and I published both our first paper on QD–ICD with different models and methodologies. I am grateful for our discussions in that time in which I learned more from Nimrod's different viewing angle. Another view has significantly been inspired by the curiosity of the scientific community on the role of phonons in QD–ICD. Several people deserve thank for helping me answering this question. Particularly, I would like to thank Ioan Baldea for introducing me to theories of phonons in nanomaterials, Andreas Komnik, who sketched the applied phonon description, Fabian Langkabel for typesetting the manuscript as well as the internship students Lena Steuer, Maik Rudolff and Joana-Lysiane Schäfer, who performed first test calculations.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The work was supported by the German Science Foundation [grant number BA 3770/2-1]; the Volkswagen foundation under the Freigeist fellowship 89525.

Log in via your institution

Log in to Taylor & Francis Online

PDF download + Online access

  • 48 hours access to article PDF & online version
  • Article PDF can be downloaded
  • Article PDF can be printed
USD 61.00 Add to cart

Issue Purchase

  • 30 days online access to complete issue
  • Article PDFs can be downloaded
  • Article PDFs can be printed
USD 886.00 Add to cart

* Local tax will be added as applicable

Related Research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.