Publication detail

Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields

Kapuscinski, P. Vaclavkova, D. Grzeszczyk, M. Slobodeniuk, AO. Nogajewski, K. Bartos, M. Watanabe, K. Taniguchi, T. Faugeras, C. Babinski, A. Potemski, M. Molas, MR.

Original Title

Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields

Type

journal article in Web of Science

Language

English

Original Abstract

The spectral signatures associated with different negatively charged exciton complexes (trions) in a WS(2)monolayer encapsulated in hBN are analyzed from low temperature and polarization resolved reflectance contrast (RC) and photoluminescence (PL) experiments, with an applied magnetic field. Based on results obtained from the RC experiment, we show that the valley Zeeman effect affects the optical response of both the singlet and the triplet trion species through the evolution of their energy and of their relative intensity, when applying an external magnetic field. Our analysis allows us to estimate a free electron concentration of similar to 1.3 x 10(11)cm(-2). The observed evolutions based on PL experiments on the same sample are different and can hardly be understood within the same simple frame, highlighting the complexity of relaxation processes involved in the PL response.

Keywords

tungsten disufide; magnetic field; photoluminiscence; trion

Authors

Kapuscinski, P.; Vaclavkova, D.; Grzeszczyk, M.; Slobodeniuk, AO.; Nogajewski, K.; Bartos, M.; Watanabe, K.; Taniguchi, T.; Faugeras, C.; Babinski, A.; Potemski, M.; Molas, MR.

Released

14. 9. 2020

Publisher

ROYAL SOC CHEMISTRY

Location

CAMBRIDGE

ISBN

1463-9076

Periodical

Physical Chemistry Chemical Physics

Year of study

22

Number

34

State

United Kingdom of Great Britain and Northern Ireland

Pages from

19155

Pages to

19161

Pages count

7

URL

https://pubs.rsc.org/en/content/articlelanding/2020/cp/d0cp02737e#!divAbstract

BibTex

@article{BUT167297,
  author="Kapuscinski, P. and Vaclavkova, D. and Grzeszczyk, M. and Slobodeniuk, AO. and Nogajewski, K. and Bartos, M. and Watanabe, K. and Taniguchi, T. and Faugeras, C. and Babinski, A. and Potemski, M. and Molas, MR.",
  title="Valley polarization of singlet and triplet trions in a WS(2)monolayer in magnetic fields",
  journal="Physical Chemistry Chemical Physics",
  year="2020",
  volume="22",
  number="34",
  pages="19155--19161",
  doi="10.1039/d0cp02737e",
  issn="1463-9076",
  url="https://pubs.rsc.org/en/content/articlelanding/2020/cp/d0cp02737e#!divAbstract"
}