Publication detail

Excitons and trions in WSSe monolayers

PUCKO, K. BLUNDO, E. ZAWADSKA, N. CIANCI,S. VÁCLAVKOVÁ, D. KAPUSCINSKI, P. JANA, D. PETTINARI, G. FELICI, M. NOGAJEWSKI, K. BARTOS, M. WATANABE, K. TANIGUCHI, T. FAUGERAS, C. POTEMSKI, M. BABINSKI, A., POLIMENI,A. MOLAS, M.R.

Original Title

Excitons and trions in WSSe monolayers

Type

journal article in Web of Science

Language

English

Original Abstract

The possibility of almost linear tuning of the band gap and of the electrical and optical properties in monolayers (MLs) of semiconducting transition metal dichalcogenide (S-TMD) alloys opens up the way to fabricate materials with on-demand characteristics. By making use of photoluminescence spectroscopy, we investigate optical properties of WSSe MLs with a S/Se ratio of 57/43 deposited on SiO2/Si substrate and encapsulated in hexagonal BN flakes. Similarly to the 'parent' WS2 and WSe2 MLs, we assign the WSSe MLs to the ML family with the dark ground exciton state. We find that, in addition to the neutral bright A exciton line, three observed emission lines are associated with negatively charged excitons. The application of in-plane and out-of-plane magnetic fields allows us to assign undeniably the bright and dark (spin- and momentum-forbidden) negative trions as well as the phonon replica of the dark spin-forbidden complex. Furthermore, the existence of the single photon emitters in the WSSe ML is also demonstrated, thus prompting the opportunity to enlarge the wavelength range for potential future quantum applications of S-TMDs.

Keywords

excitons; transition metal dichalcogenides; photoluminescence; g-factor; alloy; dark trion; phonon replica

Authors

PUCKO, K.; BLUNDO, E.; ZAWADSKA, N.; CIANCI,S.; VÁCLAVKOVÁ, D.; KAPUSCINSKI, P.; JANA, D.; PETTINARI, G.; FELICI, M.; NOGAJEWSKI, K.; BARTOS, M.; WATANABE, K.; TANIGUCHI, T.; FAUGERAS, C.; POTEMSKI, M.; BABINSKI, A., POLIMENI,A.; MOLAS, M.R.

Released

1. 1. 2023

Publisher

IOP Publishing Ltd

Location

BRISTOL

ISBN

2053-1583

Periodical

2D Materials

Year of study

10

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

015018

Pages to

15026

Pages count

9

URL

https://iopscience.iop.org/article/10.1088/2053-1583/aca915

BibTex

@article{BUT183440,
  author="PUCKO, K. and BLUNDO, E. and ZAWADSKA, N. and CIANCI,S. and VÁCLAVKOVÁ, D. and KAPUSCINSKI, P. and JANA, D. and PETTINARI, G. and FELICI, M. and NOGAJEWSKI, K. and BARTOS, M. and WATANABE, K. and TANIGUCHI, T. and FAUGERAS, C. and POTEMSKI, M. and BABINSKI, A., POLIMENI,A. and MOLAS, M.R.",
  title="Excitons and trions in WSSe monolayers",
  journal="2D Materials",
  year="2023",
  volume="10",
  number="1",
  pages="9",
  doi="10.1088/2053-1583/aca915",
  issn="2053-1583",
  url="https://iopscience.iop.org/article/10.1088/2053-1583/aca915"
}