Evaluation of bulk-interface contributions to Edelstein magnetoresistance at metal/oxide interfaces

Junyeon Kim, Yan Ting Chen, Shutaro Karube, Saburo Takahashi, Kouta Kondou, Gen Tatara, Yoshichika Otani

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

We report a systematic study on Edelstein magnetoresistance (Edelstein MR) in Co25Fe75/Cu/Bi2O3 heterostructures with a strong spin-orbit interaction at the Cu/Bi2O3 interface. We succeed in observing a significant dependence of the Edelstein MR on both Cu layer thickness and temperature, and also develop a general analytical model considering distinct bulk and interface contributions on spin relaxation. Our analysis, based on the above model, quantitatively illustrates a unique property of the spin transport near the Rashba interface, revealing a prominent role of the spin relaxation process by determining the ratios of the spin relaxation inside and outside the interface. We further find the characteristic spin transport is unaffected by temperature. Our results provide an essential tool for exploring the transport in a system with spin-momentum-locked two-dimensional states.

Original languageEnglish
Article number140409
JournalPhysical Review B
Volume96
Issue number14
DOIs
Publication statusPublished - 2017 Oct 19
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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