Strained bilayer WSe2 with reduced exciton-phonon coupling

Autor:	Ozgur Burak Aslan, Mark L. Brongersma, Tony F. Heinz, Minda Deng
Rok vydání:	2020
Předmět:	Photoluminescence Materials science Condensed matter physics Phonon Exciton Bilayer 02 engineering and technology 021001 nanoscience & nanotechnology Coupling (probability) 01 natural sciences Laser linewidth 0103 physical sciences Monolayer 010306 general physics 0210 nano-technology Spectroscopy
Zdroj:	Physical Review B. 101
ISSN:	2469-9969 2469-9950
DOI:	10.1103/physrevb.101.115305
Popis:	The authors investigate here the influence of strain on bilayer WSe${}_{2}$ using optical reflection and photoluminescence spectroscopy. The linewidth of the $A$ exciton exhibits a significant decrease, from 70 to 36 meV at room temperature under 2.1% strain. They note that this behavior is quite different in monolayer WSe${}_{2}$. They apply the model used earlier on monolayer WSe${}_{2}$ and show that the distinct behavior under strain stems from having different indirect-to-direct gap separations. Their findings are inspiring for utilizing strain for further studies on two-dimensional materials.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::acb2f1bdd9d7883917db4a6960f228d0 https://doi.org/10.1103/physrevb.101.115305 Zobrazit plný text záznamu