Existence and concentration of solutions for the Schrödinger–Poisson equations with steep well potential

In this paper we study a system of Schrödinger–Poisson equations{−Δu+λV(x)u+K(x)ϕu=|u|p−2u,in R3,−Δϕ=K(x)u2,in R3, where λ>0λ>0 is a parameter, 2