Quantum criticality nearby a certain magnetic phase transition beneath the superconducting dome of Ba1−xNaxFe2As2 is attentively studied by virtue of a phenomenological theory in conjunction with renormalization group approach. We report that ordering competition between magnetic and superconducting fluctuations is capable of coaxing incommensurate (IC) magnetic states to experience distinct fates depending upon their spin configurations. The C2-symmetry IC magnetic stripe with perpendicular magnetic helix dominates over other C2-symmetry magnetic competitors and hints at a potential candidate for the unknown C2-symmetry magnetic state. Amongst C4-symmetry IC magnetic phases, IC charge spin density wave is substantiated to be superior, shedding light on the significant intertwining of charge and spin degrees of freedom. Meanwhile, ferocious fluctuations render a sharp fall of superfluid density alongside dip of critical temperature as well as intriguing behavior of London penetration depth.
@article{arxiv.2007.14981,
title = {Incommensurate magnetic states induced by ordering competition in $\mathrm{Ba_{1-x}Na_xFe_2As_2}$},
author = {Jing Wang},
journal= {arXiv preprint arXiv:2007.14981},
year = {2022}
}