Nonsymmorphic symmetry-enforced hourglass fermions and Rashba-Dresselhaus interaction in BiInO$_3$

TL;DR

This paper explores the unique hourglass fermions and spin textures in BiInO$_3$, emphasizing the role of nonsymmorphic symmetries and spin-orbit interactions, with implications for spintronic device applications.

Contribution

It provides a detailed analysis of hourglass fermions in BiInO$_3$ using DFT and symmetry analysis, highlighting the influence of nonsymmorphic symmetries on spin textures and spin-orbit interactions.

Findings

Identification of hourglass-shaped band dispersion in BiInO$_3$

Analysis of spin polarisation governed by symmetry and spin-orbit coupling

Insights into spin-splitting mechanisms like Dresselhaus and Rashba interactions

Abstract

In this study, we investigate the spin texture of the hourglass fermions band network in BiInO$_3$ using density functional theory (DFT) and symmetry analysis. Hourglass fermions are of interest in spintronics due to their unique and robust band structure, as well as their potential applications in novel electronic devices. BiInO$_3$ exhibits non-symmorphic crystal symmetries, such as glide reflection and glide rotational symmetry, influencing its electronic properties. Through symmetry analysis, we explore the band crossings and spin textures along specific high-symmetry paths in the Brillouin zone. Our results reveal a fascinating hourglass-shaped band dispersion and spin polarisation governed by symmetry operations and spin-orbit interaction. We analyse the spin-splitting mechanisms, including Dresselhaus and Rashba spin-orbit interactions, and suggest potential applications for spin-based devices. This study sheds light on the role of symmetry in crystals for fascinating spin properties of hourglass fermions in non-symmorphic materials, offering insights for future developments in spintronics.