Indication of intrinsic spin Hall effect in 4d and 5d transition metals

M. Morota, Y. Niimi, K. Ohnishi, D. H. Wei, T. Tanaka, H. Kontani, T. Kimura, and Y. Otani
Phys. Rev. B 83, 174405 – Published 2 May 2011

Abstract

We have investigated spin Hall effects in 4d and 5d transition metals, Nb, Ta, Mo, Pd, and Pt, by incorporating the spin absorption method in the lateral spin valve structure, where large spin current preferably relaxes into the transition metals, exhibiting strong spin-orbit interactions. Thereby nonlocal spin valve measurements enable us to evaluate their spin Hall conductivities. The sign of the spin Hall conductivity changes systematically depending on the number of d electrons. This tendency is in good agreement with the recent theoretical calculation based on the intrinsic spin Hall effect.

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  • Received 18 February 2011

DOI:https://doi.org/10.1103/PhysRevB.83.174405

©2011 American Physical Society

Authors & Affiliations

M. Morota1, Y. Niimi1,*, K. Ohnishi1, D. H. Wei1, T. Tanaka2, H. Kontani2, T. Kimura1,†, and Y. Otani1,3,‡

  • 1Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
  • 2Department of Physics, Nagoya University, Furo-cho, Nagoya 464-8602, Japan
  • 3RIKEN-ASI, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan

  • *niimi@issp.u-tokyo.ac.jp
  • Present address: Inamori Frontier Research Center, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
  • yotani@issp.u-tokyo.ac.jp

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Vol. 83, Iss. 17 — 1 May 2011

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