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

    12 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

    Bibliographical note

    Funding Information:
    This work was supported by the KIST Institutional Program and the KRCF DRC Program.

    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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