title: Mechanical strain effects on black phosphorus nanoresonators.
abstract: We perform classical molecular dynamics simulations to investigate the effects of mechanical strain on single-layer black phosphorus nanoresonators at different temperatures. We find that the resonant frequency is highly anisotropic in black phosphorus due to its intrinsic puckered configuration, and that the quality factor in the armchair direction is higher than in the zigzag direction at room temperature. The quality factors are also found to be intrinsically larger than those in graphene and MoS2 nanoresonators. The quality factors can be increased by more than a factor of two by applying tensile strain, with uniaxial strain in the armchair direction being the most effective. However, there is an upper bound for the quality factor increase due to nonlinear effects at large strains, after which the quality factor decreases. The tension induced nonlinear effect is stronger along the zigzag direction, resulting in a smaller maximum strain for quality factor enhancement.
authors.affiliation: Institute of Structural Mechanics, Bauhaus-University Weimar, 99423 Weimar, Germany. chao.zhang.weimar@gmail.com.
authors.forename: Cui-Xia
authors.initials: CX
authors.lastname: Wang
authors.affiliation: Institute of Structural Mechanics, Bauhaus-University Weimar, 99423 Weimar, Germany. chao.zhang.weimar@gmail.com and College of Water Resources and Architectural Engineering, Northwest A&F University, 712100 Yangling, P.R. China.
authors.forename: Chao
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Shanghai Institute of Applied Mathematics and Mechanics, Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai 200072, People's Republic of China. jwjiang5918@hotmail.com.
authors.forename: Jin-Wu
authors.initials: JW
authors.lastname: Jiang
authors.affiliation: Department of Mechanical Engineering, Boston University, Boston, Massachusetts 02215, USA. parkhs@bu.edu.
authors.forename: Harold S
authors.initials: HS
authors.lastname: Park
authors.affiliation: Division of Computational Mechanics, Ton Duc Thang University, Ho Chi Minh City, Vietnam. timon.rabczuk@tdt.edu.vn and Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam.
authors.forename: Timon
authors.initials: T
authors.lastname: Rabczuk