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Cited by 1,309

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Local Strain Engineering in Atomically Thin MoS2

Open access
Castellanos-Gomez, Andres, Roldán, Rafael, Cappelluti, Emmanuele, Buscema, Michele, Guinea, Francisco, van der Zant, Herre S. J., Steele, Gary A.·2013·Nano Letters

Abstract

Controlling the bandstructure through local-strain engineering is an exciting avenue for tailoring optoelectronic properties of materials at the nanoscale. Atomically thin materials are particularly well-suited for this purpose because they can withstand extreme nonhomogeneous deformations before rupture. Here, we study the effect of large localized strain in the electronic bandstructure of atomically thin MoS2. Using photoluminescence imaging, we observe a strain-induced reduction of the direct bandgap and funneling of photogenerated excitons toward regions of higher strain. To understand these results, we develop a nonuniform tight-binding model to calculate the electronic properties of MoS2 nanolayers with complex and realistic local strain geometries, finding good agreement with our experimental results.

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Metadata

Authors
Castellanos-Gomez, A., Roldán, R., Cappelluti, E., Buscema, M., Guinea, F., van der Zant, H. S. J., & Steele, G. A.
Venue
Nano Letters
Published
2013-10-03
Volume
13
Issue
11
Pages
5361-5366
ISSN
  • 1530-6984 (ISSN-L)
  • 1530-6992
OpenAlex
W2008107859
Cited by
1,309
References
50
FWCI
31.38
Type
journal article
Language
en
Open access
green

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