| Full text | |
| Author(s): |
de Brito, Caique Serati
;
Rosa, Barbara L. T.
;
Chaves, Andrey
;
Cavalini, Camila
;
Rabahi, Cesar R.
;
Franco, Douglas F.
;
Nalin, Marcelo
;
Barcelos, Ingrid D.
;
Reitzenstein, Stephan
;
Gobato, Yara Galvao
Total Authors: 10
|
| Document type: | Journal article |
| Source: | Nano Letters; v. 24, n. 42, p. 7-pg., 2024-10-10. |
| Abstract | |
Monolayer transition metal dichalcogenides (TMDs) have emerged as promising materials to generate single-photon emitters (SPEs). While there are several previous reports in the literature about TMD-based SPEs, the precise nature of the excitonic states involved in them is still under debate. Here, we use magneto-optical techniques under in-plane and out-of-plane magnetic fields to investigate the nature of SPEs in WSe2 monolayers on glass substrates under different strain profiles. Our results reveal important changes on the exciton localization and, consequently, on the optical properties of SPEs. Remarkably, we observe an anomalous PL energy redshift with no significant changes of photoluminescence (PL) intensity under an in-plane magnetic field. We present a model to explain this redshift based on intervalley defect excitons under a parallel magnetic field. Overall, our results offer important insights into the nature of SPEs in TMDs, which are valuable for future applications in quantum technologies. (AU) | |
| FAPESP's process: | 15/13771-0 - Multi-User Equipment approved in grant 14/19142-2: ultra-low vibration cryostat with magnetic field and confocal microscope |
| Grantee: | Gilmar Eugenio Marques |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 19/14017-9 - From excitons waves to THz-phonons: 2Ds materials nano-optics via synchrotron infrared nanospectroscopy |
| Grantee: | Raul de Oliveira Freitas |
| Support Opportunities: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 14/07375-2 - Multi-user equipment approved in grant 2013/18719-1: time resolved measurement system |
| Grantee: | Marcio Daldin Teodoro |
| Support Opportunities: | Multi-user Equipment Program |
| FAPESP's process: | 13/07793-6 - CEPIV - Center for Teaching, Research and Innovation in Glass |
| Grantee: | Edgar Dutra Zanotto |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |
| FAPESP's process: | 22/10340-2 - Scientific MUE: acquisition of a high temporal, spatial and spectral resolution fluorescence system operating over a wide temperature range |
| Grantee: | Gilmar Eugenio Marques |
| Support Opportunities: | Research Infrastructure Program - Scientific |
| FAPESP's process: | 23/08276-7 - van der Waals heterostructures for optoeletronics and quantum technology |
| Grantee: | Yara Galvão Gobato |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 23/04832-2 - Development of faraday rotators based on oxide glasses and glass-ceramics containing perovskite nanocrystals for technological applications |
| Grantee: | Douglas Faza Franco |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 22/08329-0 - Effect of Moiré pattern on physical properties of twisted van der Waals heterostructures |
| Grantee: | Yara Galvão Gobato |
| Support Opportunities: | Regular Research Grants |