Tunable spin textures in polar antiferromagnetic hybrid organic inorganic perovskites by electric and magnetic fields

TL;DR

This study uses first principles calculations to explore how electric and magnetic fields can tune spin textures in antiferromagnetic hybrid organic-inorganic perovskites, revealing their potential for advanced optoelectronic applications.

Contribution

It demonstrates the tunability of spin textures in AFM HOIPs through electric polarization and magnetic order, a novel insight for spintronic and optoelectronic device design.

Findings

Rashba-like band splitting observed due to inversion symmetry breaking.

Spin textures can be manipulated by electric polarization and AFM magnetic order.

AFM HOIPs are promising for tunable spintronic and optoelectronic applications.

Abstract

The hybrid organic inorganic perovskites (HOIPs) have attracted much attention for their potential applications as novel optoelectronic devices. Remarkably, the Rashba band splitting, together with specific spin orientations in k space (i.e., spin texture), has been found to be relevant for the optoelectronic performances. In this work, by using first principles calculations and symmetry analyses, we study the electric polarization, magnetism, and spin texture properties of the antiferromagnetic (AFM) HOIP ferroelectric TMCM_MnCl3 (TMCM = (CH3)3NCH2Cl, trimethylchloromethyl ammonium). This recently synthesized compound is a prototype of order disorder and displacement-type ferroelectric with a large piezoelectric response, high ferroelectric transition temperature, and excellent photoluminescence properties [You et al., Science 357, 306 (2017)]. The most interesting result is that the inversion symmetry breaking coupled to the spin orbit coupling gives rise to a Rashba-like band splitting and a related robust persistent spin texture (PST) and/or typical spiral spin texture, which can be manipulated by tuning the ferroelectric or, surprisingly, also by the AFM magnetic order parameter. The tunability of spin texture upon switching of AFM order parameter is largely unexplored and our findings not only provide a platform to understand the physics of AFM spin texture but also support the AFM HOIP ferroelectrics as a promising class of optoelectronic materials.