Nehari-type ground state solutions for Schrödinger equations including critical exponent

In this paper, we study the following system of nonlinear Schrödinger equations: {−△u+a(x)u=|u|p−2u+λ(x)v,x∈RN,−△v+b(x)v=|v|2∗−2v+λ(x)u,x∈RN, where N≥3,2