Spin-polarization-induced anisotropic magnetoresistance in a two-dimensional Rashba system

Won Young Choi, Hyung jun Kim, Joonyeon Chang, Gyungchoon Go, Kyoung Jin Lee, Hyun Cheol Koo

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

In an asymmetric two-dimensional electron gas system, the Rashba effective field arises due to the intrinsic electric field. Even without ferromagnetism, the Rashba spin splitting acts as a source of spin polarization and affects the transport property of the two-dimensional electron channel. In this Rashba channel, the magnetoresistance is determined by the vector alignment between the applied field and the bias current. In addition, the channel resistance for the parallel alignment between the applied field and the Rashba field is much smaller than that for the antiparallel alignment between them, which surprisingly agrees with the spin polarization induced by the Edelstein effect. This anisotropic magnetoresistance also allows us to estimate the spin polarization in a two-dimensional quantum well channel.

Original languageEnglish
Pages (from-to)513-516
Number of pages4
JournalCurrent Applied Physics
Volume17
Issue number4
DOIs
Publication statusPublished - 2017 Apr 1

Keywords

  • 2DEG
  • Anisotropic magnetoresistance
  • Edelstein effect
  • Rashba effect
  • Spin polarization

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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