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In the present paper, we deal with the following fractional Kirchhoff–Schrödinger–Poisson system with logarithmic and critical nonlinearity:whereandΩ is a bounded domain inwith Lipschitz boundary. Combining constraint variational methods, topological degree theory and quantitative deformation arguments, we prove that the above problem has a least energy sign-changing solution. Moreover, we show that the energy ofis strictly larger than two times the ground state energy. Finally, we regard  b  as a parameter and show the convergence property ofas.

Least energy sign-changing solutions of fractional Kirchhoff–Schrödinger–Poisson system with critical and logarithmic nonlinearity