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\subsection{\texorpdfstring{Strain effects on electronic properties of phosphorene oxides}{Strain effects on electronic properties of phosphorene oxides}}
\label{sec:strain_effects_on_electronic_properties_of_phosphorene_oxides}


As \emph{x} increases in PO\textsubscript{\emph{x}}, the electronic properties of
phosphorene oxides changes. We found an intriguing phenomenon that at
around 16\% uniaxial tensile strain, PO (with \emph{x}=1) becomes a metal
with a modified Dirac cone at the gamma point in its Brillouin zone.

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