Ferroelectric polymorphic phenomena in the layered antiferromagnet Cu(OH).

Ferroic orders and their associated structural phase transitions are paramount in the understanding of a multitude of unconventional condensed matter phenomena. On this note, our investigation focuses on the polymorphic ferroelectric (FE) phase transitions of Copper(II) hydroxide, Cu(OH), considering an antiferromagnetic ground state. By employing the first-principles studies and group theory analysis, we have provided a systematic theoretical investigation of vibrational properties in the hypotheticalhigh-symmetry phase to unveil the symmetry-allowed ferroic phases.

Correlation driven topological nodal ring ferromagnetic spin gapless semimetal: CsMnF.

The observation of in-plane ferromagnetism in layered magnetic materials in conjunction with the topological nodal-ring dispersion in a spin gapless semimetal with 100 % spin polarization has a fertile ground for novel physics, rich scientific significance and for the next-generation advanced spintronic and topological devices. Topological nodal ring spin gapless semimetals with large band gap in the other spin channel prevents the spin leakage and are excellent spintronic materials. On the basis of density functional theory (DFT), we have studied the layered magnetic perovskite, CsMnFwhich is predicted to be a ferromagnetic insulator though the fellow compounds likeMnF(= Na, K, Rb) are anti-ferromagnetic in nature.