Self-energy corrections in an antiferromagnet -- interplay of classical and quantum effects on quasiparticle dispersion

Pooja Srivastava, Avinash Singh

Self-energy corrections due to fermion-magnon interaction are studied in the antiferromagnetic state of the $t-t^{\prime }-t^{\prime \prime }$ Hubbard model within the rainbow (noncrossing) approximation…