arXiv subjects

Alexander Musta

Publications and source records attributed to Alexander Musta.

2 recordsLinked to original sources

arXiv2026

Zero-phonon line emission of single photon emitters in helium-ion treated MoS$_2$

We explore the zero-phonon line of single photon emitters in helium-ion treated monolayer MoS$_2$, which are currently understood in terms of single sulfur-site vacancies. By comparing the linewidths of the zero-phonon line as extracted directly from optical spectra with values inferred from the first-order autocorrelation function of the photoluminescence, we quantify bounds of the homogeneous broadening and of phonon-assisted contributions. The results are discussed in terms of both the independent boson model and ab-initio results as computed from GW and Bethe-Salpeter equation approximations.

cond-mat.mes-hall↗

arXiv2025

In-situ profiling of pressure-induced exciton traps in suspended MoS$_2$ monolayers

We demonstrate the in-situ read-out of the spatial profile of suspended MoS$_2$ monolayers hosted on substrates with nano-structured holes. As the profiles are spatially bent, the suspended MoS$_2$ monolayers act as exciton traps with tunable luminescence intensity and energy. The tunability is realized by controlling the environmental pressure on the monolayers, which allows to control hundreds of suspended MoS$_2$ monolayers on a single substrate. The in-situ read-out is based on Fabry-P\'erot interferences and a model of the corresponding reflectance contrast maps of the investigated monolayers.

cond-mat.mes-hall↗