| Full text | |
| Author(s): |
Gobato, Y. Galvao
;
de Brito, C. Serati
;
Chaves, A.
;
Prosnikov, M. A.
;
Wozniak, T.
;
Guo, Shi
;
Barcelos, Ingrid D.
;
V. Milosevic, M.
;
Withers, F.
;
Christianen, P. C. M.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | Nano Letters; v. 22, n. 21, p. 6-pg., 2022-10-24. |
| Abstract | |
We investigated the valley Zeeman splitting of excitonic peaks in the microphotoluminescence (mu PL) spectra of high-quality hBN/WS2/MoSe2/hBN heterostructures under perpendicular magnetic fields up to 20 T. We identify two neutral exciton peaks in the mu PL spectra; the lower-energy peak exhibits a reduced g-factor relative to that of the higher energy peak and much lower than the recently reported values for interlayer excitons in other van der Waals (vdW) heterostructures. We provide evidence that such a discernible g-factor stems from the spatial confinement of the exciton in the potential landscape created by the moire pattern due to lattice mismatch or interlayer twist in heterobilayers. This renders magneto-mu PL an important tool to reach a deeper understanding of the effect of moire patterns on excitonic confinement in vdW heterostructures. (AU) | |
| FAPESP's process: | 18/01808-5 - Optical and Transport Properties in High Magnetic Fields of Semiconductor Heterostructures and Devices based on Two Dimensional Materials |
| Grantee: | Yara Galvão Gobato |
| Support Opportunities: | Scholarships abroad - Research |
| 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: | 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: | 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: | 19/23488-5 - 2D devices for optoeletronics |
| Grantee: | Yara Galvão Gobato |
| Support Opportunities: | Regular Research Grants |