Novel Magnetic Block States in Low-Dimensional Iron-Based Superconductors

Abstract

Inelastic neutron scattering recently confirmed the theoretical prediction of a $\uparrow \uparrow \downarrow \downarrow$-magnetic state along the legs of quasi-one-dimensional (quasi-1D) iron-based ladders in the orbital-selective Mott phase (OSMP). We show here that electron-doping of the OSMP induces a whole class of novel block-states with a variety of periodicities beyond the previously reported $\pi /2$ pattern. We discuss the magnetic phase diagram of the OSMP regime that could be tested by neutrons once appropriate quasi-1D quantum materials with the appropriate dopings are identified.

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