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Caption : the electronic band structures of orthogonal ga$_{2}$ses and silicene/ga$_{2}$ses heterostructure.

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Caption : the variation of total energies of monolayer ga$_{2}$ses and silicene/ga$_{2}$ses heterostructure under the presence of uniaxial strain. 

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Caption : band edge positions of (a)-(b) monolayer ga$_{2}$ses and (c)-(d) silicene/ga$_{2}$ses heterostructure as a function of uniaxial strain in x and y directions.

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Caption : the electronic band spectrum of the variation of perpendicular electric field.