File Name : figs1.eps

Caption : electronic band structure of bare hf<sub>2</sub>s monolayer with spin-orbit interaction. fermi level was shifted to zero and shown by dashed line.

File Name : figs2.eps

Caption : electronic band structure of f-terminated hf<sub>2</sub>s monolayer with spin-orbit interaction. fermi level was shifted to zero and shown by dashed line.

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Caption : electronic band structure of a) one li and b) one na atom adsorbed to hf<sub>2</sub>s monolayer with spin-orbit interaction. the red and blue lines indicate spin up and spin downs states.

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Caption : the adsorption energy of the li atoms increased one by one on hf<sub>2</sub>s monolayer.