Monolayer hexagonal Boron phosphide (BP) is a two dimensional narrow direct band gap semiconductor which has an ultra high carrier mobility [1]. Recent experimental and theoretical works show that Li intercalation can induce superconductivity of Black Phosphorous [2] and Graphene [3]. Using first principles calculation, we studied the strain induced superconductivity of Lithium intercalated bilayer BP. From electronic structure, lattice dynamic and electron-phonon coupling calculations, it is suggested that bilayer BP can transform from direct band gap semiconductor to phonon-mediated superconductor under Li intercalation [4]. The inference of tensile strain on superconductivity property of Li intercalated bilayer BP will also be presented.

[1] M. Xie, S. Zhang, B. Cai, Z. Zhu, Y. Zou, and H. Zeng, Nanoscale 8, 13407 (2016).
[2] R. Zhang, J. Waters, A. K. Geim, and I. V. Grigorieva, Nature Communications 8, 15036 (2017).
[3] G. Profeta, M. Calandra, and F. Mauri, Nature Physics 8, 131 (2012).
[4] D.L. Nguyen, C.R. Hsing, and C.M. Wei, On preparation (2017).