title: Tuning the optical, magnetic, and electrical properties of ReSe2 by nanoscale strain engineering.
abstract: Creating materials with ultimate control over their physical properties is vital for a wide range of applications. From a traditional materials design perspective, this task often requires precise control over the atomic composition and structure. However, owing to their mechanical properties, low-dimensional layered materials can actually withstand a significant amount of strain and thus sustain elastic deformations before fracture. This, in return, presents a unique technique for tuning their physical properties by "strain engineering". Here, we find that local strain induced on ReSe2, a new member of the transition metal dichalcogenides family, greatly changes its magnetic, optical, and electrical properties. Local strain induced by generation of wrinkle (1) modulates the optical gap as evidenced by red-shifted photoluminescence peak, (2) enhances light emission, (3) induces magnetism, and (4) modulates the electrical properties. The results not only allow us to create materials with vastly different properties at the nanoscale, but also enable a wide range of applications based on 2D materials, including strain sensors, stretchable electrodes, flexible field-effect transistors, artificial-muscle actuators, solar cells, and other spintronic, electromechanical, piezoelectric, photonic devices.
authors: State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences , P.O. Box 912, Beijing 100083, China.
authors: Shengxue
authors: S
authors: Yang
authors: Cong
authors: C
authors: Wang
authors: Hasan
authors: H
authors: Sahin
authors: Hui
authors: H
authors: Chen
authors: Yan
authors: Y
authors: Li
authors: Shu-Shen
authors: SS
authors: Li
authors: Aslihan
authors: A
authors: Suslu
authors: Francois M
authors: FM
authors: Peeters
authors: Qian
authors: Q
authors: Liu
authors: Jingbo
authors: J
authors: Li
authors: Sefaattin
authors: S
authors: Tongay
keywords: 2D materials; Transition metal dichalcogenides; excitonics; magnetism; photoluminescence; strain engineering