Intrinsic orbital and spin Hall effect in bismuth semimetal

Abstract

We investigate the intrinsic orbital Hall conductivity (OHC) and spin Hall conductivity (SHC) in a bismuth semimetal, by employing an sp-orbital tight-binding model. We report a notable difference between the anisotropy of OHC and SHC whose orbital and spin polarizations lie within the basal plane. We do not observe a substantial correlation between the orbital and spin Berry curvatures with spin-orbit coupling (SOC) at the Fermi energy, disproving the correlation between OHC and SHC in a strong SOC regime. We argue the huge SHC in a Bi semimetal is attributed to its gigantic SOC which strongly affects the hybridization of the p orbitals, despite its relatively small magnitude of OHC. We hope the distinct anisotropy of OHC and SHC provides a feasible means to differentiate between the two effects in experiments.

arXiv comment4 pages, 4 figures

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Cited by in corpus (6)

• Charge to spin conversion in atomically thin bismuth
• Temperature dependence of charge-to-spin conversion in rhombohedral (110) bismuth thin film
• Charge-to-spin conversion in epitaxial and polycrystalline Bi and Bi/Ag layers
• Current induced magneto-optical Kerr effect as a probe of Dirac carriers in Bi${}_{1-x}$Sb${}_x$ alloy
• Probing the Chirality of Trigonal Selenium and Tellurium by Spin and Orbital Hall Effects
• Relativistic Spin-Lattice Interaction Compatible with Discrete Translation Symmetry in Solids