Influences of spin-orbit coupling on Fermi surfaces and Dirac cones in ferroelectric-like polar metals

Abstract

Based on first-principles calculations and k .p effective models, we report physical properties of ferroelectric-like hexagonal polar metals with P63mc symmetry, which are distinct from those of conventional metals with spatial inversion symmetry. Spin textures exist on the Fermi surface of polar metals (e.g. ternary LiGaGe and elemental polar metal of Bi) and spin-momentum locking exist on accidental Dirac cones on the sixfold rotational axis, due to the spin-orbit coupling and lack of inversion symmetry in polar space group. This effect has potential applications in spin-orbitronics. Dirac points are also predicted in LiGaGe.

14 pages, 8 figures

References in corpus (7)

• Multiple types of topological fermions in transition metal silicides
• Type-II Dirac fermions in the PtSe${}_2$ class of transition metal dichalcogenides
• Hybrid Dirac Semimetal in CaAgBi Materials Family
• Dual nature of the ferroelectric and metallic state in LiOsO${}_3$
• Metallic ferroelectricity induced by anisotropic unscreened coulomb interaction in LiOsO3
• Raman phonons in the ferroelectric-like metal LiOsO${}_3$
• Parity-breaking in single-element phases: Ferroelectric-like elemental polar metals

Cited by in corpus (4)

• Noncentrosymmetric topological Dirac semimetals in three dimensions
• Coupled magnetic and structural phase transitions in the antiferromagnetic polar metal Pb2CoOsO6 under pressure
• Single crystal growths and magnetic properties of hexagonal polar semimetals RAuGe (R = Y, Gd-Tm, and Lu)
• Quantum fluctuation of ferroelectric order in polar metals