Two-dimensional silicon phosphide: low effective mass and direct band gap for future devices applications

  • Shivam Kansara
  • Prabal Dev Bhuyan
  • Yogesh Sonvane
  • Sanjeev K. GuptaEmail author
Electronic materials


The band engineering using strain and electric field of monolayer silicon phosphide (2D-SiP) has been investigated by first-principle calculation. The biaxial strain is used to tune the electronic band gap from 1.91 to 0.7 eV by applying compressive strain 0–10% and 1.91–1.0 eV by tensile strain from 0 to 12%. Furthermore, SiP shows metallic behaviour beyond 12% of compressive strain and 14% of tensile strain. However, the negligible effect of the external electric field on the electronic band structure of 2D SiP shows the sustainability of the monolayer. The stress vs strain curve shows the excellent mechanical stability of the monolayer SiP. 2D SiP also shows low electron effective mass for higher carrier mobility. Further, optical properties of the monolayer show the UV region absorption. Our results provide insights to possible mechanical tuning of SiP monolayer by applying external strain for nano-electronic and nano-optoelectronic device application.


Supplementary material

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Supplementary material 1 (DOCX 2070 kb)


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Advance Materials Lab, Department of Applied PhysicsS.V. National Institute of TechnologySuratIndia
  2. 2.Computational Materials and Nanoscience Group, Department of Physics and ElectronicsSt. Xavier’s CollegeAhmedabadIndia

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