Least energy sign-changing solutions for fractional critical Kirchhoff-Schrodinger-Poisson with steep potential well

In this paper, we consider the following Kirchhoff-Schr & ouml;dinger-Poisson equation: { (a+b[u](2)s)(-Delta)su+V lambda(x)u+phi u=|u|(p-2)u+|u|(2)& lowast;s-2uinR(3), (-Delta)t phi=u2 inR(3) wheres is an element of(34,1),t is an element of(0,1),p>4,V lambda(x)=lambda V(x)+1 with lambda>0 and [u](2)s=integral R-3 integral R(3)u(x)-u(y)|(2)/|x-y|(3+2s) dxdy Under some conditions onV, when lambda>0 large enough andb>0 small enough,we use the deformation lemma and constrained minimization arguments to provethe existence of least energy sign-changing solutions. Additionally, we prove the leastenergy sign-changing solutions is strictly larger than twice that the ground state energy.In particular, a further analysis of the phenomenon of concentration for least energysign-changing solutions as lambda ->infinity andb -> 0.