Strain engineering in monolayer WS2, MoS2, and the WS2/MoS2 heterostructure | Zendy

Xin He | Zendy; Hai Li | Zendy; Zhiyong Zhu | Zendy; Zhenyu Dai | Zendy; Yang Yang | Zendy; Peng Yang | Zendy; Qiang Zhang | Zendy; Peng Li | Zendy; Udo Schwingenschlögl | Zendy; Xixiang Zhang | Zendy

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Strain engineering in monolayer WS2, MoS2, and the WS2/MoS2 heterostructure

Author(s) -

Xin He,

Hai Li,

Zhiyong Zhu,

Zhenyu Dai,

Yang Yang,

Peng Yang,

Qiang Zhang,

Peng Li,

Udo Schwingenschlögl,

Xixiang Zhang

Publication year - 2016

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/1.4966218

Subject(s) - trion , monolayer , heterojunction , exciton , materials science , photoluminescence , strain engineering , van der waals force , strain (injury) , substrate (aquarium) , optoelectronics , spectroscopy , nanotechnology , condensed matter physics , chemistry , silicon , physics , oceanography , organic chemistry , quantum mechanics , medicine , molecule , geology

Mechanically exfoliated monolayers of WS2, MoS2 and their van der Waals heterostructure were fabricated on flexible substrate so that uniaxial tensile strain can be applied to the two-dimensional samples. The modification of the band structure under strain was investigated by micro-photoluminescence spectroscopy at room temperature as well as by first-principles calculations. Exciton and trion emissions were observed in both WS2 and the heterostructure at room temperature, and were redshifted by strain, indicating potential for applications in flexible electronics and optoelectronics

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