In this paper, we dedicate to studying the following semilinear
Schrödinger system
equation*-Δu+V1(x)u=Fu(x,u,v)amp;mboxin~RN,r-Δv+V2(x)v=Fv(x,u,v)amp;mboxin~RN,ru,v∈H1(RN),endequation* where the potential Vi are periodic in x,i=1,2, the nonlinearity F is allowed super-quadratic
at some
x
∈
R
N
and asymptotically quadratic at the other
x
∈
R
N
. Under a local super-quadratic condition of F, an
approximation argument and variational method are used to prove the existence of Nehari–Pankov type ground state solutions and the least energy
solutions.