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Recently, room temperature superconductor has draw a lot of attention. Previous studies haven shown $H_2S$ is superconducting near room temperature given enough pressure.
I wonder if water $H_2O$ will be superconducting if suppress it hard enough. Has anyone tried? If not, why?
There is a theoretical prediction that pure $\mathrm{H_2O}$ will become a superconductor at pressures above $5$ TPa with a critical temperature of $\mathrm{T_c=}1.8\,\mathrm{K}$. Such pressures are currently not experimentally achievable, but there is another prediction that a few percent doping with nitrogen would make water a superconductor with $\mathrm{T_c \sim}60\,\mathrm{K}$ at an accessible pressure of only $\mathrm{0.15\,TPa}$. Unfortunately, nitrogen and water don't seem to mix well under these conditions. An experimental study could find no sign of ice doping by nitrogen at high pressures up to $\mathrm{0.14\,TPa}$.
