Roles of nonlocal conductivity on spin Hall angle measurement

Kai Chen, Shufeng Zhang

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Spin Hall angle characterizes the rate of spin-charge current conversion and it has become one of the most important material parameters for spintronics physics and device application. A long-standing controversy is that the spin Hall angles for a given material measured by spin pumping and by spin Hall torque experiments are inconsistent and they could differ by as much as an order of magnitude. By using the linear response spin transport theory, we explicitly formulate the relation between the spin Hall angle and measured variables in different experiments. We find that the nonlocal conductivity inherited in the layered structure plays a key role to resolve conflicting values of the spin Hall angle. We provide a generalized scheme for extracting spin transport coefficients from experimental data.

Original languageEnglish (US)
Article number134401
JournalPhysical Review B
Volume96
Issue number13
DOIs
StatePublished - Oct 2 2017

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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