Disorder-induced broadening of excitonic resonances in transition metal dichalcogenides

Dwedari, Magdulin; Brem, Samuel; Feierabend, Maja; Malić, Ermin

doi:10.1103/physrevmaterials.3.074004

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Exciton Energy Levels1

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2021

2022

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Cited by 3 publications

(2 citation statements)

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“…28 Another consequence of the field-induced modification of the exciton spectrum is anomalous broadening of n = 2 absorption line. The underlying mechanism 29,30 is the elastic scattering of Q = 0 state into the states with finite center-of-mass momentum, Q. This scattering is enabled by the mexican-hat shape of the spectrum.…”

Section: Discussionmentioning

confidence: 99%

Long-living excited states of a 2D diamagnetic exciton

Putnam

Raǐkh

2022

Solid State Communications

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Section: Discussionmentioning

confidence: 99%

Long-living excited states of a 2D diamagnetic exciton

Putnam

Raǐkh

2022

Solid State Communications

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“…We denote these localized exciton states as LX. [21,24] Combining a neutral exciton with one electron/hole or another exciton generates trions (X − or X + ) or biexcitons (XX), respectively,…”

Section: Exciton Energy Levelsmentioning

confidence: 99%

Exciton luminescence and many-body effect of monolayer WS₂ at room temperature

Li¹,

Zheng²,

Zheng³

et al. 2022

Chinese Phys. B

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Monolayer transition metal dichalcogenides favor the formation of a variety of excitonic quasiparticles, and can serve as an ideal material for exploring room-temperature many-body effects in two-dimensional systems. Here, using mechanically exfoliated monolayer WS2 and photoluminescence (PL) spectroscopy, exciton emission peaks are confirmed through temperature-dependent and electric-field-tuned PL spectroscopy. The dependence of exciton concentration on the excitation power density at room temperature is quantitatively analyzed. Exciton concentrations covering four orders of magnitude are divided into three stages. Within the low carrier concentration stage, the system is dominated by excitons, with a small fraction of trions and localized excitons. At the high carrier concentration stage, the localized exciton emission from defects coincides with the emission peak position of trions, resulting in broad spectral characteristics at room temperature.

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