CUED Publications database

Discrete quantum dot like emitters in monolayer MoSe<inf>2</inf>: Spatial mapping, magneto-optics, and charge tuning

Branny, A and Wang, G and Kumar, S and Robert, C and Lassagne, B and Marie, X and Gerardot, BD and Urbaszek, B (2016) Discrete quantum dot like emitters in monolayer MoSe<inf>2</inf>: Spatial mapping, magneto-optics, and charge tuning. Applied Physics Letters, 108. p. 142101. ISSN 0003-6951

Full text not available from this repository.

Abstract

© 2016 Author(s). Transition metal dichalcogenide monolayers such as MoSe2, MoS2, and WSe2are direct bandgap semiconductors with original optoelectronic and spin-valley properties. Here we report on spectrally sharp, spatially localized emission in monolayer MoSe2. We find this quantum dot-like emission in samples exfoliated onto gold substrates and also suspended flakes. Spatial mapping shows a correlation between the location of emitters and the existence of wrinkles (strained regions) in the flake. We tune the emission properties in magnetic and electric fields applied perpendicular to the monolayer plane. We extract an exciton g-factor of the discrete emitters close to -4, as for 2D excitons in this material. In a charge tunable sample, we record discrete jumps on the meV scale as charges are added to the emitter when changing the applied voltage.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 20:04
Last Modified: 23 Jun 2018 20:14
DOI: