Study of Intrinsic Spin and Orbital Hall Effects in Pt Based on a (6s, 6p, 5d) TightBinding Model
Abstract
We study the origin of the intrinsic spin Hall conductivity (SHC) and the dorbital Hall conductivity (OHC) in Pt based on a multiorbital tightbinding model with spinorbit interaction. We find that the SHC exceeds 1000 \hbar e^{1}\cdotΩ^{1} cm^{1} when the resistivity ρ is smaller than ∼10 {\micro}Ω cm, whereas it decreases to 300 \hbar e^{1}\cdotΩ^{1} cm^{1} when ρ∼ 100 {\micro}Ω cm. In addition, the OHC is still larger than the SHC. The origin of the huge spin Hall effect (SHE) and dorbital Hall effect (OHE) in Pt is the “effective AharonovBohm phase” that is induced by the interorbital transition between d_{xy} and d_{x2y2}orbitals with the aid of the strong spinorbit interaction.
 Publication:

Journal of the Physical Society of Japan
 Pub Date:
 October 2007
 DOI:
 10.1143/JPSJ.76.103702
 arXiv:
 arXiv:0705.3535
 Bibcode:
 2007JPSJ...76j3702K
 Keywords:

 Condensed Matter  Mesoscale and Nanoscale Physics;
 Condensed Matter  Strongly Correlated Electrons
 EPrint:
 5 pages