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arXiv · 1602.02010

Stark effect spectroscopy of mono- and few-layer MoS$_{2}$

Julian Klein·Jakob Wierzbowski·Armin Regler·Jonathan Becker·Florian Heimbach·Kai Müller·Michael Kaniber·Jonathan J. Finley
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Abstract

We demonstrate electrical control of the A-exciton interband transition in mono- and few-layer $MoS_{2}$ crystals embedded into photocapacitor devices via the DC Stark effect. Electric field dependent low-temperature photoluminescence spectroscopy reveals a significant tuneability of the A-exciton transition energy, up to $\sim 16 meV$, from which we extract the mean DC exciton polarisability $<\bar{\beta}>_{N} = (0.58 \pm 0.25) \cdot 10^{-8} DmV^{-1}$. The exciton polarisability is shown to be layer-independent, indicating a strong localisation of both electron and hole wave functions in each individual layer.

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Julian Klein, Jakob Wierzbowski, Armin Regler, Jonathan Becker, Florian Heimbach, Kai Müller, Michael Kaniber, Jonathan J. Finley. 2016-02-05. Stark effect spectroscopy of mono- and few-layer MoS$_{2}$. https://doi.org/10.1021/acs.nanolett.5b03954

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