Journal of East China Normal University(Natural Science) ›› 2021, Vol. 2021 ›› Issue (1): 92-102.doi: 10.3969/j.issn.1000-5641.202022005

• Physics and Electronics • Previous Articles     Next Articles

Electron spin coherence dynamics in CdS crystals

Jiaxing GUO1(), Zhen WU1, Pan LIANG2,*(), Meizhen JIANG1, Rongrong HU1,3, Yuanyuan ZHANG1, Donghai FENG1,*()   

  1. 1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200241, China
    2. College of Arts and Sciences, Shanghai Dianji University, Shanghai 201306, China
    3. Colloge of Sciences, Shanghai Institute of Technology, Shanghai 200235, China
  • Received:2020-03-14 Online:2021-01-25 Published:2021-01-28
  • Contact: Pan LIANG,Donghai FENG;;


In this paper, we use time-resolved Kerr rotation(TRKR) spectroscopy to study the electron spin coherence dynamics of a wurtzite (0001) plane n-CdS single crystal at different temperatures and wavelengths. Two types of electronic spin signals are observed in this material at low temperatures. One is a long-lived spin signal at relatively long pump probe wavelengths, where the spin dephasing time exceeds 4.8 ns at 5 K and decreases with increasing temperature. The other is a short-lived spin signal at relatively short pump probe wavelengths, where the spin dephasing time is about 40 ps and persists up to room temperature; in this case, the spin signal is largely independent of temperature. Studies have shown that long-lived spin signals can be attributed to localized electrons, while short-lived spin signals can be attributed to conduction delocalized electrons.

Key words: electron spin, CdS, single crystal, pump-probe

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