Bulletin of the American Physical Society
2023 APS March Meeting
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session G53: TMDCs: Excitons, magnetism and spin dependent effects
11:30 AM–2:30 PM,
Tuesday, March 7, 2023
Room: Room 307
Sponsoring
Unit:
GMAG
Chair: Matt Stone, Oak Ridge National Lab
Abstract: G53.00001 : Many-body Hexcitons and Oxcitons in Monolayer Semiconductors*
11:30 AM–12:06 PM
Presenter:
Hanan Dery
(University of Rochester)
Author:
Hanan Dery
(University of Rochester)
In the archetypal monolayer semiconductor WSe2, the distinct ordering of spin-polarized valleys (low-energy pockets) in the CB allows for studies of not only simple neutral excitons and charged excitons (i.e., trions), but also more complex many-body states that are predicted at higher electron densities [1]. I will discuss magneto-optical measurements of electron-rich WSe2 monolayers [2], and interpret the spectral lines that emerge at high electron doping as optical transitions of 6-body exciton states (``hexcitons'') and 8-body exciton states (``oxcitons''). These many-body states emerge when a photoexcited electron-hole pair interacts simultaneously with multiple Fermi seas, each having distinguishable spin and valley quantum numbers.
[2] Dinh Van Tuan, Su-Fei Shi, Xiaodong Xu, Scott A. Crooker and Hanan Dery, Hexcitons and oxcitons in monolayer WSe2, Phys. Rev. Lett. 129, 076801 (2022).
*This work was supported by the Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-SC0014349, and by the Office of Naval Research, under Award N000142112448.
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