Observation of spin-orbit interaction parameter over a wide temperature range using potentiometric measurement

Youn Ho Park, Hyun Cheol Koo, Kyung Ho Kim, Hyung Jun Kim, Joonyeon Chang, Suk Hee Han, Hijung Kim

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Spin-orbit interaction parameter (α) can be obtained by measuring the Shubnikov-de Haas oscillation, but this method is valid at only very low temperature. The current induced spin polarization in a 2-D electron gas layer is measured by potentiometric geometry which measures spin dependent chemical potential shifts. Subsequently, a spin-orbit interaction parameter can be extracted up to T = 250 K. In an inverted In0.52Al 0.48As/In0.53Ga0.47As/In0.52Al 0.48As quantum well system, α of 5.65 × 10-12 eVm and 3.85 × 10-12 eVm are obtained at T = 1.8 and 250 K, respectively.

Original languageEnglish
Article number5467584
Pages (from-to)1562-1564
Number of pages3
JournalIEEE Transactions on Magnetics
Volume46
Issue number6
DOIs
Publication statusPublished - 2010 Jun
Externally publishedYes

Keywords

  • 2-D electron gas (2DEG)
  • Potentiometric measurement
  • Rashba effect
  • Spin-orbit interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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