Self-energy driven resonance-like inelastic neutron spectrum in $s_{++}$-wave state in Fe-based superconductors

Lisa Takeuchi, Youichi Yamakawa, Hiroshi Kontani

To elucidate the pairing states in Fe-based superconductors, we perform careful calculation of the dynamical spin susceptibility ${\chi }^S(q,\omega )$ at very low temperatures ($T\sim 1$ me…