Charging energy spectrum of black phosphorus quantum dots

M. A. Lino, J. S. De Sousa, D. R. Da Costa, A. Chaves, J. M. Pereira, G. A. Farias

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We present a theoretical study of the charging effects in single and double layer black phosphorus quantum dots (BPQDs) with lateral sizes of 2 nm and 3 nm. We demonstrate that the charging of BPQDs are able to store up to an N max electron (that depends on the lateral size and number of layers in the QD), after which structural instabilities arises. For example, 3 nm wide hydrogen-passivated single layer BPQDs can hold a maximum of 16 electrons, and an additional electron causes the expelling of hydrogen atoms from the QD borders. We also calculated the addition energy (E A) spectrum. For single-layer QDs with 2 and 3 nm lateral sizes, the average E A is around 0.4 eV and 0.3 eV, respectively. For double layer QDs with the same sizes, the average E A is around 0.25 eV and 0.2 eV, respectively.

Original languageEnglish (US)
Article number305103
JournalJournal of Physics D: Applied Physics
Volume50
Issue number30
DOIs
StatePublished - Jul 11 2017
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2017 IOP Publishing Ltd.

Keywords

  • addition energy spectrum
  • coulomb blockade
  • phosphorene quantum dots

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