Study of intrinsic spin and orbital Hall effects in Pt based on a (6s, 6p, 5d) tight-binding model
Abstract
We study the origin of the intrinsic spin Hall conductivity (SHC) and the d-orbital Hall conductivity (OHC) in Pt based on a multiorbital tight-binding model with spin-orbit interaction. We find that the SHC reaches 1000 /e cm when the resistivity is smaller than ~10 μ cm, whereas it decreases to 300 /e cm when ~ 100 μ cm. In addition, the OHC is still larger than the SHC. The origin of huge SHE and OHE in Pt is the large ``effective magnetic flux'' that is induced by the interorbital transition between dxy- and dx2-y2-orbitals with the aid of the strong spin-orbit interaction.
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