We study the intrinsic spin Hall conductivity (SHC) and the d-orbital Hall conductivity (OHC) in metallic d-electron systems based on the multiorbital tight-binding model. The obtained Hall conductivities are much larger than that in p-type semiconductors. The origin of these huge Hall effects is the "effective Aharonov-Bohm phase" induced by the signs of inter-orbital hopping integrals as well as atomic spin-orbit interaction. Huge SHC and OHC due to this mecahnism is ubiquitous in multiorbital transition metals.
@article{arxiv.0711.1444,
title = {Spin Hall effect in Sr2RuO4 and transition metals (Nb,Ta)},
author = {T. Tanaka and H. Kontani and M. Naito and D. S. Hirashima and K. Yamada and J. Inoue},
journal= {arXiv preprint arXiv:0711.1444},
year = {2009}
}
Comments
4 pages, 3 figures, Proceedings of SNS conference in Sendai, 2007