Observation of picosecond electron spin relaxation in InGaAsP by time-resolved spin-dependent pump and probe reflection measurement

Ryo Harasawa, Naoki Yamamoto, Hao Wu, Takanori Aritake, Shulong Lu, Lian Ji, Atsushi Tackeuchi

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    We have investigated the electron spin relaxation in undoped InGaAsP grown on an InP substrate. Time-resolved spin-dependent pump and probe reflection measurements revealed a spin relaxation behavior between 10 and 300K. We have observed the electron spin relaxation times of 980ps at 10K and 95ps at room temperature. The observed presence of the carrier density dependence and the weak temperature dependence of spin relaxation time imply that the Bir-Aronov-Pikus (BAP) process is effective at 10-30K. At 100-300K, the observed presence of the temperature dependence and the absence of the carrier density dependence of spin relaxation time indicate that the D'yakonov-Perel' (DP) and Elliott-Yafet (EY) processes are effective.

    Original languageEnglish
    Pages (from-to)1244-1247
    Number of pages4
    JournalPhysica Status Solidi (B) Basic Research
    Volume252
    Issue number6
    DOIs
    Publication statusPublished - 2015 Jun 1

    Fingerprint

    electron spin
    Relaxation time
    Pumps
    pumps
    Carrier concentration
    Electrons
    probes
    relaxation time
    Temperature
    temperature dependence
    Substrates
    room temperature

    Keywords

    • InGaAsP
    • Semiconductors
    • Spin relaxation
    • Spintronics

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Observation of picosecond electron spin relaxation in InGaAsP by time-resolved spin-dependent pump and probe reflection measurement. / Harasawa, Ryo; Yamamoto, Naoki; Wu, Hao; Aritake, Takanori; Lu, Shulong; Ji, Lian; Tackeuchi, Atsushi.

    In: Physica Status Solidi (B) Basic Research, Vol. 252, No. 6, 01.06.2015, p. 1244-1247.

    Research output: Contribution to journalArticle

    Harasawa, Ryo ; Yamamoto, Naoki ; Wu, Hao ; Aritake, Takanori ; Lu, Shulong ; Ji, Lian ; Tackeuchi, Atsushi. / Observation of picosecond electron spin relaxation in InGaAsP by time-resolved spin-dependent pump and probe reflection measurement. In: Physica Status Solidi (B) Basic Research. 2015 ; Vol. 252, No. 6. pp. 1244-1247.
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    AU - Harasawa, Ryo

    AU - Yamamoto, Naoki

    AU - Wu, Hao

    AU - Aritake, Takanori

    AU - Lu, Shulong

    AU - Ji, Lian

    AU - Tackeuchi, Atsushi

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