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Strain tuning of optical emission energy and polarization in monolayer and bilayer MoS2

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Zhu, C. R., Wang, G., Liu, B. L., Marie, X., Qiao, X. F., Zhang, X., Wu, X. X., Fan, H., Tan, P. H., Amand, T., Urbaszek, B.·2013·Physical Review B

Abstract

We use micro-Raman and photoluminescence (PL) spectroscopy at 300 K to investigate the influence of uniaxial tensile strain on the vibrational and optoelectronic properties of monolayer and bilayer MoS${}_{2}$ on a flexible substrate. The initially degenerate ${E}^{\ensuremath{'}}$ monolayer Raman mode is split into a doublet as a direct consequence of the strain applied to MoS${}_{2}$ through Van der Waals coupling at the sample-substrate interface. We observe a strong shift of the direct band gap of 48 meV/(% of strain) for the monolayer and 46 meV/% for the bilayer, whose indirect gap shifts by 86 meV/%. We find a strong decrease of the PL polarization linked to optical valley initialization for both monolayer and bilayer samples, indicating that scattering to the spin-degenerate $\ensuremath{\Gamma}$ valley plays a key role.

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Metadata

Authors
Zhu, C. R., Wang, G., Liu, B. L., Marie, X., Qiao, X. F., Zhang, X., Wu, X. X., Fan, H., Tan, P. H., Amand, T., & Urbaszek, B.
Venue
Physical Review B
Published
2013-09-09
Volume
88
Issue
12
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
OpenAlex
W2044603534
Cited by
465
References
1
FWCI
13.17
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Strain tuning of optical emission energy and polarization in monolayer and bilayer MoS2. https://app.cochat.ai/papers/10.1103/physrevb.88.121301
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Zhu, C. R., Wang, G., Liu, B. L., Marie, X., Qiao, X. F., Zhang, X., Wu, X. X., Fan, H., Tan, P. H., Amand, T., & Urbaszek, B. (2013). Strain tuning of optical emission energy and polarization in monolayer and bilayer MoS2. Physical Review B. https://doi.org/10.1103/physrevb.88.121301

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