Brightening of dark excitons in monolayers of semiconducting transition metal dichalcogenides

We present low-temperature magneto-photoluminescence experiments which demonstrate the brightening of dark excitons by an in-plane magnetic field B applied to monolayers of different semiconducting transition metal dichalcogenides. For WSe2 and WS2 monolayers, the dark exciton emission is observed a...

Full description

Saved in:
Bibliographic Details
Published in2d materials Vol. 4; no. 2; pp. 21003 - 21008
Main Authors Molas, M R, Faugeras, C, Slobodeniuk, A O, Nogajewski, K, Bartos, M, Basko, D M, Potemski, M
Format Journal Article
LanguageEnglish
Published IOP Publishing 01.06.2017
Subjects
Condensed Matter
dark excitons
Disordered Systems and Neural Networks
Materials Science
molybdenum diselenide
molybdenum disulfide
Physics
Quantum Physics
transition metal dichalcogenides monolayers
tungsten diselenide
tungsten disulfide
Voigt configuration
Online AccessGet full text

Cover

More Information
Summary:We present low-temperature magneto-photoluminescence experiments which demonstrate the brightening of dark excitons by an in-plane magnetic field B applied to monolayers of different semiconducting transition metal dichalcogenides. For WSe2 and WS2 monolayers, the dark exciton emission is observed at   50 meV below the bright exciton peak and displays a characteristic doublet structure whose intensity grows with B2, while no magnetic field induced emission peaks appear for MoSe2 monolayer. Our experiments also show that the MoS2 monolayer has a dark exciton ground state with a dark-bright exciton splitting energy of   100 meV.
Bibliography:2DM-101197
ISSN:2053-1583
2053-1583
DOI:10.1088/2053-1583/aa5521